"With ui.qml file" must not be enabled for Qt versions < 5.4

1. Start Creating a Qt Quick (Controls) Application or Qt Quick (Controls) UI project.
2. Proceed to the "Define Project Details" page.
3. In the combo box, select "Qt 5.3".
4. Check "With ui.qml file".
5. Finish creating the project.
6. Try running this project on Qt 5.3.
   You'll see QML errors like: "untitled.qml:7 MainForm is not a type"
7. Rename MainForm.ui.qml to MainForm.qml.
8. Try running this project on Qt 5.3.
   Now it works.

It seems Qt 5.3 is not able to handle ui.qml files. If this is a bug in Qt, it will not be fixed anymore. So Creator should not create projects with ui.qml files when minimum Qt version 5.3 is selected.

Found by Squish tests tst_qtquick_creation and tst_qtquick_creation3.