title: TYPO3 CKEditor – configuration not working
body: <p>I have an TYPO3 8.7.7 installation and I am using rte_ckeditor. I am trying to configure the editor – but it seems not to work. 
  When I set <code>RTE.default.preset = full</code> or anything else nothing changes in my backend form. </p>
  
  <p>But I need to configure some individual options. So I set the default preset to my own YAML file (<code>RTE.default.preset = mytemplate</code>) which is also registered in my extension ext_localconf.php with </p>
  
  <pre><code>$GLOBALS['TYPO3_CONF_VARS']['RTE']['Presets']['mytemplate'] = 'EXT:mytemplate/Configuration/RTE/rte.yaml';
  </code></pre>
  
  <p>I have cleared typo3temp Folder, system caches via backend, all caches via install tool, deactivated and reactivated my template extension.</p>
  
  <p>I also do not change anything in my backend form at the RTE.</p>
  
  <p>The only thing it did sometimes, when I clear the system cache in backend and save the backend form TYPO3 shows me syntax error in my YAML file – which are all solved now, but it also do not show anything again. Just the default RTE...</p>
  
  <p>My YAML file has nothing special... just come classes and the format tags "pre" relaced with "h6"</p>
  
  <pre><code>imports:
      - { resource: "EXT:rte_ckeditor/Configuration/RTE/Processing.yaml" }
      - { resource: "EXT:rte_ckeditor/Configuration/RTE/Editor/Base.yaml" }
      - { resource: "EXT:rte_ckeditor/Configuration/RTE/Editor/Plugins.yaml" }
  
  editor:
    config:
  
      contentsCss: ["EXT:mytemplate/Resources/Public/css/rte/rte.css"]
  
      format_tags: "p;h1;h2;h3;h4;h5;h6"
  
      stylesSet:
        - { name: "align-left", element: ['h1', 'h2', 'h3', 'h4','h5', 'h6', 'p', 'td', 'th'], attributes: { 'class': 'align-left' }}
        - { name: "align-center", element: ['h1', 'h2', 'h3', 'h4','h5', 'h6', 'p', 'td', 'th'], attributes: { 'class': 'align-center' }}
        - { name: "align-right", element: ['h1', 'h2', 'h3', 'h4','h5', 'h6', 'p', 'td', 'th'], attributes: { 'class': 'align-right' }}
        - { name: "align-justify", element: ['h1', 'h2', 'h3', 'h4','h5', 'h6', 'p', 'td', 'th'], attributes: { 'class': 'align-justify' }}
        - { name: "Headline Stil 1", element: ['h1', 'h2', 'h3', 'h4','h5', 'h6'], attributes: { 'class': 'headline-style-1' }}
        - { name: "Headline Stil 2", element: ['h1', 'h2', 'h3', 'h4','h5', 'h6'], attributes: { 'class': 'headline-style-2' }}
        - { name: "Headline Stil 3", element: ['h1', 'h2', 'h3', 'h4','h5', 'h6'], attributes: { 'class': 'headline-style-3' }}
        - { name: "Headline Stil 4", element: ['h1', 'h2', 'h3', 'h4','h5', 'h6'], attributes: { 'class': 'headline-style-4' }}
        - { name: "Button-Link Primär", element: ['a'], attributes: { 'class': 'rte-btn-primary' }}
        - { name: "Button-Link Sekundär", element: ['a'], attributes: { 'class': 'rte-btn-secondary' }}
        - { name: "Button-Link Tertiär", element: ['a'], attributes: { 'class': 'rte-btn-tertiary' }}
  
      toolbarGroups:
        - { name: styles, groups: [ styles, format ] }
        - { name: basicstyles, groups: [ basicstyles ] }
        - { name: paragraph, groups: [ list, indent, blocks, align ] }
        - { name: links, groups: [ links ] }
        - { name: clipboard, groups: [ clipboard, cleanup, undo ] }
        - { name: editing, groups: [ spellchecker ] }
        - { name: insert, groups: [ insert ] }
        - { name: tools, groups: [ table, specialchar ] }
        - { name: document, groups: [ mode ] }
  
      justifyClasses:
        - align-left
        - align-center
        - align-right
        - align-justify
  
      extraPlugins:
        - justify
  
      removePlugins:
        - image
  
      removeButtons:
        - Anchor
        - Underline
        - Strike
        - Styles
  </code></pre>
  
  <p>What is the trick to get my config working?!</p>