Updated project is not compiled sufficiently

1. Create a new CMake-based Qt Widget Application project using Creator's wizard.
2. Press Ctrl+R.
   The project will be compiled and started.
3. Close the started Widget Application.
4. Double-click the project's .ui file in Projects view.
   The file will be opened in Creator's integrated Widget designer.
5. Drag a widget into the window preview.
   I used a Check Box.
6. Press Ctrl+R.
   Creator will ask whether changed files should be saved.
7. Click "Save All"
   The project will be compiled and started. It does not contain the widget from step 5.
8. Close the started Widget Application.
9. Press Ctrl+R.
   The project will be compiled and started. Now it contains the widget from step 5.

The compilation after step 7 is insufficient. It should update the project to contain the added widget.