COntext Menu SHould be Triggerable from the Keyboard

[BlindGuyNW]

A common pattern in MekHQ is the selection of an item from a table, and then right-clicking that item to produce a context menu. This should also be made accessible from the keyboard—the usual Windows shortcut is shift+F10, as current screen readers make clicking on items with the mouse in Java apps unreliable.

[sixlettervariables]

Looking into this, you apparently cannot create a custom popup menu via key bindings. You have to use componentPopupMenu. I'm going to see how that would be possible given our dynamic creation of popup menus.