test for calling hotkey.callback programmatically
test for calling hotkey.callback programmatically

(cherry picked from commit 6ba78bbf48c5a7fb4a4184a2845927027ff67ae1)

ChurchDesk/angular-hotkeys,kunalkamble/angular-hotkeys,mattraykowski/angular-hotkeys,chieffancypants/angular-hotkeys,gbasto/angular-hotkeys,tomgutz/angular-hotkeys,websiddu/angular-hotkeys,mo3taz-abdallh/angular-hotkeys,richtmat/angular-hotkeys