Delete shortcut

[bszonye]

A shortcut for pin deletion would be handy. The stock code has a handler, commented out, for deleting pins with a right-click. I can see why – that seems prone to accidental deletion. CQUI uses a right click on the pins list instead, which seems safer but I’m not totally convinced. A hotkey on the edit popup (#18) would also make sense if it doesn’t conflict with the edit box.

[bszonye]

As discussed in #18, it might be cleaner to handle this with a modifier key. Holding down the shift key could turn the edit buttons into delete buttons.