I accidentaly hit the spacebar and repeat last action when building tab was opened - production stopped. None of my friends know about this trick, so I hope to help the other players too.
Example to use for start/stop multiple building production:
- Click first building and then click start/stop button
- click bext building and just hit the spacebar. Repeat for next buildings.
This is very simple way to make your 20, 30 or more buildings start or stop.
Trick works for other buttons too - i.e.: scrollling friend list (click the arrow and then spacebar), but it's not so practical as start/stop.
If BB want to improve spacebar key, just bind it as a "start/stop" shortcut.
Shortcuts to build, economy, trade and star would be usefull too.