Relabel Hotkeys settings menu

In order to clarify we should change the labels in the hotkeys menu and add another header to indicate the list of hotkeys

translations

Title DE - Tastaturkürzel Einstellungen EN - Hotkey Menu

Hotkey switch DE - Tastaturkürzel aktivieren EN - Activate Hotkeys

Hotkey list DE - Liste der Tastaturkürzel EN - List of Hotkeys