protected function limitMenu($blnOptional=false)
	{
		/** @var AttributeBagInterface $objSessionBag */
		$objSessionBag = System::getContainer()->get('session')->getBag('contao_backend');

		$session = $objSessionBag->all();
		$filter = ($GLOBALS['TL_DCA'][$this->strTable]['list']['sorting']['mode'] == 4) ? $this->strTable.'_'.CURRENT_ID : $this->strTable;
		$fields = '';

		// Set limit from user input
		if (Input::post('FORM_SUBMIT') == 'tl_filters' || Input::post('FORM_SUBMIT') == 'tl_filters_limit')
		{
			$strLimit = Input::post('tl_limit');

			if ($strLimit == 'tl_limit')
			{
				unset($session['filter'][$filter]['limit']);
			}
			else
			{
				// Validate the user input (thanks to aulmn) (see #4971)
				if ($strLimit == 'all' || preg_match('/^[0-9]+,[0-9]+$/', $strLimit))
				{
					$session['filter'][$filter]['limit'] = $strLimit;
				}
			}

			$objSessionBag->replace($session);

			if (Input::post('FORM_SUBMIT') == 'tl_filters_limit')
			{
				$this->reload();
			}
		}

		// Set limit from table configuration
		else
		{
			$this->limit = ($session['filter'][$filter]['limit'] != '') ? (($session['filter'][$filter]['limit'] == 'all') ? null : $session['filter'][$filter]['limit']) : '0,' . Config::get('resultsPerPage');

			$arrProcedure = $this->procedure;
			$arrValues = $this->values;
			$query = "SELECT COUNT(*) AS count FROM " . $this->strTable;

			if (!empty($this->root) && \is_array($this->root))
			{
				$arrProcedure[] = 'id IN(' . implode(',', $this->root) . ')';
			}

			// Support empty ptable fields
			if ($GLOBALS['TL_DCA'][$this->strTable]['config']['dynamicPtable'])
			{
				$arrProcedure[] = ($this->ptable == 'tl_article') ? "(ptable=? OR ptable='')" : "ptable=?";
				$arrValues[] = $this->ptable;
			}

			if (!empty($arrProcedure))
			{
				$query .= " WHERE " . implode(' AND ', $arrProcedure);
			}

			$objTotal = $this->Database->prepare($query)->execute($arrValues);
			$this->total = $objTotal->count;
			$options_total = 0;
			$blnIsMaxResultsPerPage = false;

			// Overall limit
			if (Config::get('maxResultsPerPage') > 0 && $this->total > Config::get('maxResultsPerPage') && ($this->limit === null || preg_replace('/^.*,/', '', $this->limit) == Config::get('maxResultsPerPage')))
			{
				if ($this->limit === null)
				{
					$this->limit = '0,' . Config::get('maxResultsPerPage');
				}

				$blnIsMaxResultsPerPage = true;
				Config::set('resultsPerPage', Config::get('maxResultsPerPage'));
				$session['filter'][$filter]['limit'] = Config::get('maxResultsPerPage');
			}

			$options = '';

			// Build options
			if ($this->total > 0)
			{
				$options = '';
				$options_total = ceil($this->total / Config::get('resultsPerPage'));

				// Reset limit if other parameters have decreased the number of results
				if ($this->limit !== null && ($this->limit == '' || preg_replace('/,.*$/', '', $this->limit) > $this->total))
				{
					$this->limit = '0,'.Config::get('resultsPerPage');
				}

				// Build options
				for ($i=0; $i<$options_total; $i++)
				{
					$this_limit = ($i*Config::get('resultsPerPage')).','.Config::get('resultsPerPage');
					$upper_limit = ($i*Config::get('resultsPerPage')+Config::get('resultsPerPage'));

					if ($upper_limit > $this->total)
					{
						$upper_limit = $this->total;
					}

					$options .= '
  <option value="'.$this_limit.'"' . Widget::optionSelected($this->limit, $this_limit) . '>'.($i*Config::get('resultsPerPage')+1).' - '.$upper_limit.'</option>';
				}

				if (!$blnIsMaxResultsPerPage)
				{
					$options .= '
  <option value="all"' . Widget::optionSelected($this->limit, null) . '>'.$GLOBALS['TL_LANG']['MSC']['filterAll'].'</option>';
				}
			}

			// Return if there is only one page
			if ($blnOptional && ($this->total < 1 || $options_total < 2))
			{
				return '';
			}

			$fields = '
<select name="tl_limit" class="tl_select' . (($session['filter'][$filter]['limit'] != 'all' && $this->total > Config::get('resultsPerPage')) ? ' active' : '') . '" onchange="this.form.submit()">
  <option value="tl_limit">'.$GLOBALS['TL_LANG']['MSC']['filterRecords'].'</option>'.$options.'
</select> ';
		}

		return '
<div class="tl_limit tl_subpanel">
<strong>' . $GLOBALS['TL_LANG']['MSC']['showOnly'] . ':</strong> '.$fields.'
</div>';
	}
protected function limitMenu($blnOptional=false)
	{
		/** @var AttributeBagInterface $objSessionBag */
		$objSessionBag = System::getContainer()->get('session')->getBag('contao_backend');

		$session = $objSessionBag->all();
		$filter = ($GLOBALS['TL_DCA'][$this->strTable]['list']['sorting']['mode'] == 4) ? $this->strTable.'_'.CURRENT_ID : $this->strTable;
		$fields = '';

		// Set limit from user input
		if (Input::post('FORM_SUBMIT') == 'tl_filters' || Input::post('FORM_SUBMIT') == 'tl_filters_limit')
		{
			$strLimit = Input::post('tl_limit');

			if ($strLimit == 'tl_limit')
			{
				unset($session['filter'][$filter]['limit']);
			}
			else
			{
				// Validate the user input (thanks to aulmn) (see #4971)
				if ($strLimit == 'all' || preg_match('/^[0-9]+,[0-9]+$/', $strLimit))
				{
					$session['filter'][$filter]['limit'] = $strLimit;
				}
			}

			$objSessionBag->replace($session);

			if (Input::post('FORM_SUBMIT') == 'tl_filters_limit')
			{
				$this->reload();
			}
		}

		// Set limit from table configuration
		else
		{
			$this->limit = ($session['filter'][$filter]['limit'] != '') ? (($session['filter'][$filter]['limit'] == 'all') ? null : $session['filter'][$filter]['limit']) : '0,' . Config::get('resultsPerPage');

			$arrProcedure = $this->procedure;
			$arrValues = $this->values;
			$query = "SELECT COUNT(*) AS count FROM " . $this->strTable;

			if (!empty($this->root) && \is_array($this->root))
			{
				$arrProcedure[] = 'id IN(' . implode(',', $this->root) . ')';
			}

			// Support empty ptable fields
			if ($GLOBALS['TL_DCA'][$this->strTable]['config']['dynamicPtable'])
			{
				$arrProcedure[] = ($this->ptable == 'tl_article') ? "(ptable=? OR ptable='')" : "ptable=?";
				$arrValues[] = $this->ptable;
			}

			if (!empty($arrProcedure))
			{
				$query .= " WHERE " . implode(' AND ', $arrProcedure);
			}

			$objTotal = $this->Database->prepare($query)->execute($arrValues);
			$this->total = $objTotal->count;
			$options_total = 0;
			$blnIsMaxResultsPerPage = false;

			// Overall limit
			if (Config::get('maxResultsPerPage') > 0 && $this->total > Config::get('maxResultsPerPage') && ($this->limit === null || preg_replace('/^.*,/', '', $this->limit) == Config::get('maxResultsPerPage')))
			{
				if ($this->limit === null)
				{
					$this->limit = '0,' . Config::get('maxResultsPerPage');
				}

				$blnIsMaxResultsPerPage = true;
				Config::set('resultsPerPage', Config::get('maxResultsPerPage'));
				$session['filter'][$filter]['limit'] = Config::get('maxResultsPerPage');
			}

			$options = '';

			// Build options
			if ($this->total > 0)
			{
				$options = '';
				$options_total = ceil($this->total / Config::get('resultsPerPage'));

				// Reset limit if other parameters have decreased the number of results
				if ($this->limit !== null && ($this->limit == '' || preg_replace('/,.*$/', '', $this->limit) > $this->total))
				{
					$this->limit = '0,'.Config::get('resultsPerPage');
				}

				// Build options
				for ($i=0; $i<$options_total; $i++)
				{
					$this_limit = ($i*Config::get('resultsPerPage')).','.Config::get('resultsPerPage');
					$upper_limit = ($i*Config::get('resultsPerPage')+Config::get('resultsPerPage'));

					if ($upper_limit > $this->total)
					{
						$upper_limit = $this->total;
					}

					$options .= '
  <option value="'.$this_limit.'"' . Widget::optionSelected($this->limit, $this_limit) . '>'.($i*Config::get('resultsPerPage')+1).' - '.$upper_limit.'</option>';
				}

				if (!$blnIsMaxResultsPerPage)
				{
					$options .= '
  <option value="all"' . Widget::optionSelected($this->limit, null) . '>'.$GLOBALS['TL_LANG']['MSC']['filterAll'].'</option>';
				}
			}

			// Return if there is only one page
			if ($blnOptional && ($this->total < 1 || $options_total < 2))
			{
				return '';
			}

			$fields = '
<select name="tl_limit" class="tl_select' . (($session['filter'][$filter]['limit'] != 'all' && $this->total > Config::get('resultsPerPage')) ? ' active' : '') . '" onchange="this.form.submit()">
  <option value="tl_limit">'.$GLOBALS['TL_LANG']['MSC']['filterRecords'].'</option>'.$options.'
</select> ';
		}

		return '
<div class="tl_limit tl_subpanel">
<strong>' . $GLOBALS['TL_LANG']['MSC']['showOnly'] . ':</strong> '.$fields.'
</div>';
	}
Return a select menu to limit results

@param boolean $blnOptional

@return string