Arch: Revised preference ui files, remove WindowColor

Follow-up PR of #11940.

* The new ui layout follows that of the Draft preferences.
* The ConversionFast checkbox enables/disables the 3  preferences listed below it.
* The WindowColor preference was removed. It is not a per-object, or even a per-file setting. The fix in #11940 would change windows in existing projects when they are recomputed. It is therefore better to keep the V0.21 solution where the glass is colored according to the preferences and the rest of the window receives a color based on its ShapeColor. Users who want to apply specific colors can use a multi-material.

src/Mod/Arch/ArchCommands.py

@@ -84,7 +84,7 @@ def getDefaultColor(objectType):
         c = params.get_param("constructioncolor")
         transparency = 0.80
     else:
-        c = params.get_param_arch("WindowColor")
+        c = params.get_param_view("DefaultShapeColor")
     r, g, b, _ = Draft.get_rgba_tuple(c)
     return (r, g, b, transparency)
 

src/Mod/Arch/ArchWindow.py

@@ -1174,9 +1174,7 @@ class _ViewProviderWindow(ArchComponent.ViewProviderComponent):
                 typeidx = (i*5)+1
                 if typeidx < len(obj.WindowParts):
                     typ = obj.WindowParts[typeidx]
-                    if typ == WindowPartTypes[0]:  # "Frame"
-                        ccol = ArchCommands.getDefaultColor("")
-                    elif typ == WindowPartTypes[2]:  # "Glass panel"
+                    if typ == WindowPartTypes[2]:  # "Glass panel"
                         ccol = ArchCommands.getDefaultColor("WindowGlass")
             if not ccol:
                 ccol = base