Help text for Quick Assign and Smart Assign

In the "ZScript Parser" window (which appears after clicking 'Compile' in the 'Compile ZScript' window), we have four buttons:

• Quick Assign
• Smart Assign
• OK
• Cancel

OK starts a manual assign, but what is the difference between Quick Assign and Smart Assign? We have space on this window for help text buttons.

Another related suggestion. OK brings up the Assign Compiled Script window. Cancel closes the ZScript Parser window. Suggest renaming the buttons as such:

'OK' -> 'Manual Assign' or just 'Assign'
'Cancel' -> 'Close' or 'Done'

The strings "Quick Assign" and "Smart Assign" are in do_compile_and_slots in compilezscript.cpp