QmlDesigner: Move ImportManagerView to ItemLibrary

Change-Id: I546199945e4b0b0acc7e4b656da547868b1cc99d
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>
QmlDesigner: Cleanup the ItemLibraryWidget

Change-Id: I4686ed5e5c218e1e37a189bdfc19cdb4ea4640f6
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>
QmlDesigner: Hide the filter widget for import in the ItemLibraryWidget

Change-Id: I3a7120793d3a6a34b45a22dbb25cf6a5381580e8
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>
QmlDesigner: Fix transformation bug for tab widgets

Change-Id: Idc33ddf04f0b6fc317aeb5ed72fd7164ba174ab4
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>