fix #1530

fix #1520

When the layout was locked, the viewers still could move or resize each window just once, before the windows get locked. The problem was conceptual, since the properties draggable and resizable have been added to the layout definition, creating a conflict between the definition of the layout (draggable/resizable) and the role definition in addition to the locked state.

custom start time of recording now works in firefox

Add single hand lowering

added a bindable property to access the client's handraise state

can now use the presentation thumbnails with a tool selected

update localization files

fixed the code that prioritize a video window when the user clicks on it

Fix the tooltips

 - force hangup of user when he leaves the meeting. When users call in through the phone, they don't get ejected
   from the meeting when they logout.

This reverts commit 961626f4.

 - reset videoHolder dimensions and position to display properly when user publish,stop, then publish webcam