Stabilize XCEditor shell foundation widgets

tests/UI/Editor/unit/CMakeLists.txt

@@ -5,9 +5,12 @@ set(EDITOR_UI_UNIT_TEST_SOURCES
     test_ui_editor_command_dispatcher.cpp
     test_ui_editor_command_registry.cpp
     test_ui_editor_menu_model.cpp
+    test_ui_editor_menu_session.cpp
     test_ui_editor_panel_registry.cpp
     test_ui_editor_collection_primitives.cpp
     test_ui_editor_panel_chrome.cpp
+    test_ui_editor_panel_frame.cpp
+    test_ui_editor_tab_strip.cpp
     test_ui_editor_shortcut_manager.cpp
     test_ui_editor_workspace_controller.cpp
     test_ui_editor_workspace_layout_persistence.cpp