Material: Material appearance

Uses new material system for appearance

Each feature object now has a property called ShapeMaterial that
describes its physical properties. If it has a shape, it has a
material.

The ShapeColor attribute is replaced by a ShapeAppearance attribute.
This is a material list that describes all appearance properties, not
just diffuse color. As a list in can be used for all elements of a
shape, such as edges and faces.

A new widget is provided to allow the user to select materials in a
consistent fashion. It can also launch the material editor with its
more advanced capabilities.

src/Mod/Material/App/MaterialLibrary.h

@@ -79,7 +79,7 @@ public:
     std::shared_ptr<Material> addMaterial(const std::shared_ptr<Material>& material,
                                           const QString& path);
     std::shared_ptr<std::map<QString, std::shared_ptr<MaterialTreeNode>>>
-    getMaterialTree(const MaterialFilter* filter = nullptr) const;
+    getMaterialTree(const std::shared_ptr<Materials::MaterialFilter>& filter) const;
 
     bool isReadOnly() const
     {
@@ -99,7 +99,7 @@ protected:
     void updatePaths(const QString& oldPath, const QString& newPath);
     QString getUUIDFromPath(const QString& path) const;
     bool materialInTree(const std::shared_ptr<Material>& material,
-                        const MaterialFilter* filter) const;
+                        const std::shared_ptr<Materials::MaterialFilter>& filter) const;
 
     bool _readOnly;
     std::unique_ptr<std::map<QString, std::shared_ptr<Material>>> _materialPathMap;