Keyboard and gamepad experience is limited

[OverloadedOrama]

You need a mouse to fully use the input settings. Current limitations include:

• [x] Once the shortcut selector dialog appears, there is no way to select Cancel or OK from the keyboard or gamepad, without resorting to mouse. This is intentional for the keyboard shortcut selector since it listens to keyboard input, but it should not happen to the rest. We also need a way for the keyboard shortcut selector dialog to exit, if someone is using a gamepad. EDIT: Fixed in 461dc83e0c2ef343ea01bf099db58921afa54472
• [ ] No way to delete a shortcut, or an action's list of shortcuts, without using the mouse to click on the delete button.