Authoring: redesign the context-sensitive menu for editing Sappho scripts

[ChrisPC]

Right now, right-clicking on an operator brings up an alphabetic list of every single operator of that type. That may occasionally be useful, but 99% of the time, it's not what I want.

Right-clicking on a field in a typical editor brings up a context-sensitive menu with common editing actions: Cut, Copy, Paste. I'd add some SWAT-specific actions, and we'd need some way to access the alphabetic list, as well.

Picturing a menu something like this:

• Cut
• Copy
• Paste
• Outsert
• ———————
• List of operators...

I would also change how mouse clicks work in Sappho editing boxes. Right now, after you open a script, initially no operator is selected; clicking on an operator selects it; there is no way to deselect; and right-clicking on any whitespace brings up the context-sensitive menu for the currently-selected operator, even if it's located in a distant part of the script. If the operator has been scrolled off-screen, this menu will render outside the window, or possibly even beyond the boundaries of the user's screen resolution, effectively invisible.

Instead, I would make a left-click on any whitespace outside of operators deselect the operator. Maybe also add a new context-sensitive menu for right-clicking on whitespace in the Sappho box or outside the Consequences/Roles/Option boxes, with items like Undo, Redo, ComeFrom Lizard, and Scriptalyzer.