RGB Matrix now supports 2 colors

Added speed dial show/hide button to RGB Matrix editor
Improved Function Selection documentation
Updated translations
Virtual Console: fixed knobs rendering on OSX
Show Manager: Improved to fit on a 1024x768 resolution
Fixture Editor: Fixed display of head channels

Fixed mongoose SSL build flags
Fix crash in Collection::postRun

- replace lock()/unlock() pairs with QMutexLocker - for exception safety
- lock also m_runningChildren, since slocChildrenStopped() is probably
  called from UI thread, and all other accesses are from timer thread.
More mutex fixes - master timer

- use QMutexLocker
- add/fix comments