fixed z/index and some other minor stuff
fixed bugs:
- on certain conditions, monitor could not start if it needed to synchronize the xml file on tablet connection
- presentation crashing if it had no startingviewport or transitions defined
- crash when a rare race condition occured while disconnecting just after the answer of a command was received (so it attempts to change the no more existent command light indicator)
- When switching to Monitor, will no longer enable gestures. Use F1 to pull the context menu.