QmlDesigner: Tab should be not movable anymore

Change-Id: I3a2e433157c65deb6ca85c8128046ce535ec59be
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>
QmlDesigner: Add AbstractFormEditorTool::toFormEditorItemList

Change-Id: I3b47a82b64932dc42bc2948ce4a2e8e290fc0324
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>
QmlDesigner: Add blur render image

To give the impression that the content is non editable.

Change-Id: I1869d02a27b2d1a7c2c12abb9a8d8d24068adf22
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>