Value of the property 'containsMouse' is incorrect for a MouseArea that rejects mouse events on press (onPressed: mouse.accepted = false) and is a child of another MouseArea.

Launch the test program (nested_mouse_area.qml) and follow these steps:
1. Put the mouse cursor inside the grey rectangle
2. Press the left mouse button
3. Release the mouse button
4. Press the left mouse button

After step 1., containsMouse is expectedly set to true.
After step 2., containsMouse is unexpectedly set to false even though the mouse is still over the MouseArea.
After step 3., containsMouse is unexpectedly set to true then false even though the mouse is still over the MouseArea.