QmlDesigner: Promote visibility changes of item library items

Change-Id: Ie4b70a2785fbd9199a81ffaf879f521431aa609d
Reviewed-by: Tim Jenssen <tim.jenssen@digia.com>
QmlDesigner: Fix section visibility

Change-Id: Ic663e7f8aa8916bb7531c1a2da05e6b2b45bfcb9
Reviewed-by: Tim Jenssen <tim.jenssen@digia.com>
QmlDesigner: Remove visibilityChanged

Change-Id: Ica52f8a9837eb1b041c890181beda839f3b99a4f
Reviewed-by: Tim Jenssen <tim.jenssen@digia.com>
QmlDesigner: Add item library section visibility

Search is working again

Change-Id: Ie6d52f476e2b9b5c3256bc289bcdd5dcadafea93
Reviewed-by: Tim Jenssen <tim.jenssen@digia.com>
QmlDesigner: Cleanup item library

Change-Id: I863ae9a3e84ee6af7be56fa8ebf5a350f8e2db34
Reviewed-by: Tim Jenssen <tim.jenssen@digia.com>
QmlDesigner: Use QQuickWidget in states editor

Change-Id: Ic2f5b75eb470687b4985d61a38a8346d7947a4eb
Reviewed-by: Tim Jenssen <tim.jenssen@digia.com>
QmlDesigner: Using QQuickWidget in the Property Editor

Change-Id: Ib0bd01a2698e6d8483704de1f8a165696f25ec5e
Reviewed-by: Tim Jenssen <tim.jenssen@digia.com>
QmlDesigner: Use QQuickWidget in the item library

Change-Id: I8297b513722fb5fc51fedadfd5f93e3198800ada
Reviewed-by: Tim Jenssen <tim.jenssen@digia.com>
QmlDesigner: Direct update of the position

This is maybe harmful shortcut in 99.99% of the cases it should work
better.

Change-Id: Ia162666862498ac331c9f5381cb12753d34758c1
Reviewed-by: Tim Jenssen <tim.jenssen@digia.com>