MINOR UPDATE1. Hopefully fixed the vertical scrollbar from appearing after a minimize when it was not showing before minimization.
2. Hopefully fixed the DropDownWidth bug.
3. Added
<var> that will allow you to specify it as many times as you want in both prefix and suffix. (If not specified then old method works of putting it in the middle of prefix+suffix.)
4. Added another button parameter to allow you to specify if the command window should stay open once command is done. (Useful for commands that need information reviewed.)
5. Added a resize helper that shows the outline of the buttons when resizing the form.
6. Added Move Left/Right One to the context menu of each button and separator.
7. Hopefully did not break anything, but let me know if I did and I will set about to fix it with a hotfix update.
Note: See first post for download url.

As for showing the whitespaces in the textbox I am not sure it would be possible with a normal textbox.