BUG: Fix main window context menu so it isn't everywhere
BUG: Fix main window context menu so it isn't everywhere

The context menu on the main Thunderbird window was popping up if the
user clicked anywhere in the status bar, not just on the Send Later
piece of the status bar. This is now fixed.

jikamens/send-later,jikamens/send-later,jikamens/send-later,jikamens/send-later