#4732: class ObjectVisualCreator was added.
 #4724: hints for objects on graph was added
#4724: update
#4724: Formatting toolTip + #4731: fixed segfault
#4722: Final stage creating proxyModel for table

- Now it is based on just QAbstractTableModel, not actual proxyModel,
but hardly connected to real model
- Uses signals/slots to recognize if something changed and reloads
everything, forming QMap of indexes again
Merge remote-tracking branch 'origin/devel' into 4722_creating_proxy_for_table

Also, expanding table as far as content field added
Conflicts:
	src/GraphScene.cpp
	src/GraphScene.h
	src/src.pro
	src/widgets/GraphView.cpp