title: AutoComplete TextBox Multiple Entries Comma Separated
body: <p>Is there any way of making a TextBox widget that autocompletes, but allows you to autocomplete each time you have a separator, for example a ",". </p>
  
  <p>Let's say I want to write a list of fruits in a textbox, for example:</p>
  
  <p>"Apples, Pears"</p>
  
  <p>...and my list of valid entries is let's say [ Apples, Pears, Oranges, Clementines ]
  so each time I type a comma it resets the autocompletion, so that for example "A" was autocompleted to "Apples", but then typing a comma and then typing "Pe"  will auto-complete to "Pears".</p>
  
  <p>Big ask I know, but just in case...</p>