This is a follow-up of #10910

For things are left open:

1. On paste: If it is possible to add this keyword, directly add it without requiring the user to press Enter
2. Double click on keyword: remove it and enter edit mode. Example:
   double click on "Where"
   
   leads to
   
3. Reorder keywords by drag and drop
4. Alphabetic ordering of keywords. In case the list is already alphabetically ordered, add the new keyword in alphabetical order. Otherwise, add it to the end

If something does not work, it should be explained why it is not possible.