[DF-3183] Material filter model improvement
Merge branch 'feature-integration-new-materials' of https://github.com/dava/dava.framework into feature-integration-new-materials

Conflicts:
	Tools/ResourceEditor/ResourceEditorQtVS2010.vcxproj.filters
[DF-3183] Implemented filter model / automatic node expanding
[DF-3184] Added texture preview to material editor
Merge branch 'feature-integration-new-materials' of https://github.com/dava/dava.framework into feature-integration-new-materials

Conflicts:
	Tools/ResourceEditor/Classes/Qt/MaterialEditor/MaterialEditor.cpp
	Tools/ResourceEditor/Classes/Qt/MaterialEditor/MaterialEditor.h
	Tools/ResourceEditor/ResourceEditorQtVS2010.vcxproj.filters
Merge branch 'feature-integration-new-materials' of https://github.com/dava/dava.framework into feature-integration-new-materials