Gets textual representation for the given trigger.
This function is returning a translated string for presentation to end users for example in menu items or in help texts.
display in use may influence the resulting string in
various forms, such as resolving hardware keycodes or by
causing display-specific modifier names.
The form of the representation may change at any time and is not guaranteed to stay identical.
GdkDisplayto print for.
The data is owned by the caller of the method.