Simulate the shell matching a combo for a window and push keys.action
for every action bound to it.
Target window.
Combo such as Ctrl+S (normalized before matching).
Action ids that were triggered.
Simulate the user rebinding (or unbinding with null) an action, then
push the window's complete keys.bindings.
Owning window.
Registered action id.
New combo, or null to unbind.
false when the action is unknown or the combo is invalid/reserved.
The keys mock service with its
pressKeyandrebindcontrols.