QTableWidget: Cell can be selected even if NoSelection mode is on

QTableWidget cell stays selected when cells are navigated with the tab key and esc is pressed. QTableWidget has NoSelection set on.

Steps to reproduce the issue:
1. Run attached example application.
2. Double click cell to edit.
3. Press tab.
4. Press escape.

-> Cell stays "selected" even after pressing the escape key.

As a temporary workaround one can implement keyReleaseEvent and clear table selection once the escape key is pressed.