In the gradients example, allow the user to select and show
QGradient's named presets.
Change-Id: I40bc6cbe3a0316ce49d67d63511881b6f6112574
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Updated those .qdoc files to refer to the new relative examples
emplacement. Images and snippets to be moved later.
Also grouped all widgets related examples under widgets.
Change-Id: Ib29696e2d8948524537f53e8dda88f9ee26a597f
Reviewed-by: J-P Nurmi <j-p.nurmi@nokia.com>