Conflicts:
	src/adaptors/UBSvgSubsetAdaptor.cpp

Locked items cannot be moved horizontally by its frame.

Text items can be resized correctly now.

Frame buttons

Fix to Sankore 636. Now copyes of video and audio items stops in the sate tomes when stops original items.

Generating of missing thumbnails no more crashes Sankore.

Improved performance of navigating between pages.

Conflicts:
	src/domain/UBGraphicsScene.cpp