Tests: Add basic autotests

Check the controls can be loaded at least.

Controls:
- Combobox
- Label
- Menubar
- Page
- ProgressBar
- RadioButton
- Slider
- StatusBar
- Tab
- TabFrame
- TableViewColumn
- ToolBar
- ToolButton

Change-Id: I5e6f798fd22d3f46a257d9aca2957ff932fac982
Reviewed-by: J-P Nurmi <jpnurmi@digia.com>
Reviewed-by: Jens Bache-Wiig <jens.bache-wiig@digia.com>