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/materialtools/cardutils.py

@@ -28,7 +28,7 @@ from os.path import join
 from pathlib import Path
 
 import FreeCAD
-import Material
+import Materials
 
 
 unicode = str
@@ -260,7 +260,7 @@ def output_resources(resources):
 # used in material editor and FEM material task panels
 
 def import_materials(category='Solid', template=False):
-    materialManager = Material.MaterialManager()
+    materialManager = Materials.MaterialManager()
     mats = materialManager.Materials
     materials = {}
     cards = {}