Material: MaterialTreeWidget usability enhancements

Improves the MaterialTreeWidget beyond minimum viable product.

- Filters can now be filter lists to allow a variety of filtering
	options.
- User preferences allow the inclusion/exclusion of favorites and
	recents.
- Widget state such as expansion, tree expansions, etc are saved and
	restored.
- show current appearancee material when editing.
- implements a python interface

#fixes 13421: always opens full tree

src/Mod/Material/App/AppMaterial.cpp

@@ -27,9 +27,7 @@
 #include <Base/Interpreter.h>
 #include <Base/PyObjectBase.h>
 
-// #include "Model.h"
-#include "MaterialFilter.h"
-
+#include "MaterialFilterPy.h"
 #include "MaterialManagerPy.h"
 #include "MaterialPy.h"
 #include "ModelManagerPy.h"
@@ -68,6 +66,7 @@ PyMOD_INIT_FUNC(Materials)
     Base::Console().Log("Loading Material module... done\n");
 
     Base::Interpreter().addType(&Materials::MaterialManagerPy::Type, module, "MaterialManager");
+    Base::Interpreter().addType(&Materials::MaterialFilterPy::Type, module, "MaterialFilter");
     Base::Interpreter().addType(&Materials::MaterialPy::Type, module, "Material");
     Base::Interpreter().addType(&Materials::ModelManagerPy::Type, module, "ModelManager");
     Base::Interpreter().addType(&Materials::ModelPropertyPy::Type, module, "ModelProperty");