title: Dropdown menus in PysimpleGUI
body: <p>I am looking for a PysimpleGUI way to create dropdown menus.
  Currently, I can create ComboBoxes as such:</p>
  <pre><code>import PySimpleGui as sg
  sg.Combo(list1, size = params)
  </code></pre>
  <p>This creates an Input box and a dropdown list with a slider populated by list1 elements.</p>
  <hr />
  <p>However, my users are very sloppy with inputs and I'd like to restrict them to a simple dropdown list.</p>
  <hr />
  <p>Now I know I could maybe use the ListBox element but it doesn't have a slider/seems much less versatile than Combo.</p>
  <hr />
  <p>What other arguments could I pass to Combo to make this work?</p>
  <hr />
  <p>NB:In the documentation they state that Combo == InputCombo == Drop == DropDown but without giving more details but it confuses me a lot.</p>