Marking tst_qquickmousearea as insignificant on win

This test seems flaky in windows.

Task-number: QTBUG-33006
Change-Id: I1c67e1a498e4c5765580a316504e04776af5e109
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>
Marking tst_qquickitem as insignificant in win

This test haven't passed in WIN after the stage was made blocking.

Task-number: QTBUG-32664
Change-Id: I0e84ff202d28a018e3e04dcf15f3a9ce6c66349b
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>
Add changes-5.1.1 file

Task-number: QTBUG-32808
Change-Id: I44852be41c18491a38f80afa71eda8b85b51381d
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Merge remote-tracking branch 'origin/release' into stable

Change-Id: I3953f2473e3b2cf9768286fef1c5efd08c61c6f0
Don't repaint the Canvas if it's just changing position.

Task-number: QTBUG-33005

Change-Id: I94613c0a0e066798800e068aee7c6288fce54dbd
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>