Let the JS GUI take care of hiding the GUI and silhouettes and remove
the according hardcoding in the engine following 89aef0b6eb.
Thereby fix some bugs (like not having hid the GUI if there was a
message box or different page shown while playing a path) and
fix these two hotkeys broken by 5d49e6c456.
Differential Revision: https://code.wildfiregames.com/D631Fixes#4633
Reviewed By: Vladislav
This was SVN commit r19797.
Doesn't provide a way to add/delete nodes of paths yet.
Differential Revision: https://code.wildfiregames.com/D348
Patch By: Vladislav
This was SVN commit r19427.
Based on existing code that was still around from an old(not working)
implementation.
Supports basic control from trigger scirpts (queue, start and stop
camera paths) and works in multiplayer.
This was SVN commit r17594.
