OverlaySheet: Add a focusedItem property
This allows to set an item within the sheet which will recieve the focus when the sheet gets open.
If the property is not set, the focus will be given to the sheet's
FocusScope (flickableContents
) to ensure that that the capture
of the Esc
key works reliably.
BUG: 433991 FIXED-IN: 5.81
Test snippet: testOverlayFocus.qml