Adds a submenu for quickly generating and submitting debug output, with
a button to copy the Debug ID to the clipboard and a one-click option to
restart with logging enabled. Debug output can also now be viewed in
real-time using the new debug output viewer window (previously available
only via a command-line flag).
The locale switcher has moved to the top of the Advanced prefpane (where
Debug Output Logging used to go) in a Miscellaneous section, and there's
a new "Advanced Configuration" section (mirroring Thunderbird) at the
bottom for "Config Editor".
Closes#1108
c2bb4ac10b