[DF-1876] Remover close button from system menu, when cancel not allowed
Merge branch 'development' of https://github.com/dava/dava.framework into development
[DF-1927] Some menus are disabled when there is no opened scenes in editor
Merge branch 'development' of https://github.com/dava/dava.framework into development
[DF-1927] fix after merge
Merge branch 'development' of https://github.com/dava/dava.framework into development

Conflicts:
	Tools/ResourceEditor/Classes/Qt/Main/mainwindow.cpp
Merge branch 'development' of https://github.com/dava/dava.framework into development
[DF-1872] Invisible (by LOD) item are shown with different color in sceneTree
[DF-185] More accurate convert 3d pos to 2d screen pos
[DF-185] Added resetTransform action
Merge branch 'development' of https://github.com/dava/dava.framework into development

Conflicts:
	Tools/ResourceEditor/Classes/Qt/Main/mainwindow.cpp
Merge branch 'development' of https://github.com/dava/dava.framework into development