Platform: keymap tests cosmetics
(cherry picked from commit 607ba58)
Platform: deleting shortcut from bound and inherited action fixed

Details:

* when we delete a shortcut from child's action, the parent shortcuts are copied and assigned to che child
* when there is no such a shortcut to delete, nothing happens

* when we delete a shortcut from a bound action, the base action's shortcuts are copied to the dependent action
(cherry picked from commit 296a5dc)
java-xdebugger: IDEA-125035 Debugger: breakpoints: unmute on finish: inconsistencies between behavior and appearance
(cherry picked from commit 2a64442)