New addition to show a live window with the Function prototype after a successful AutoComplete.
The window ends up in the same place as the AutoComplete window after it closes, or instead of it when only 1 item is found.
The Live part comes into play when you continue typing, for every new comma(,) typed, the highlighted argument in the window will follow.
Changing between arguments after they are in the document should also change the highlighted argument.
[will commit after i clean up some code]