Attacher UX enhancements

- New editor for MapMode with button to open attacher dialog
- Hide attachment properties when they are not applicable
- Disable super placement ui in attacher dialog when object is not attached
- Always select used mode in mode list

src/App/PropertyStandard.cpp

@@ -295,7 +295,7 @@ TYPESYSTEM_SOURCE(App::PropertyEnumeration, App::PropertyInteger);
 
 PropertyEnumeration::PropertyEnumeration()
 {
-
+    _editorTypeName = "Gui::PropertyEditor::PropertyEnumItem";
 }
 
 PropertyEnumeration::PropertyEnumeration(const App::Enumeration &e)