Delete Variables with "Delete" / "Backspace" Key

I have a habbit of selecting events and hitting “Delete” or “Backspace” to delete the event.

If your gonna force people to use the Variable page, please add more shortcuts or QL to the workflow.

It was literally the first thing i tried to delete a variable.

If possible, please make it a bit more visible which variable is being selected as to not make deleting mistakes.

Its also an accessibility feature, i have a hard time working with the mouse since i keep missing where it is due to poor eye sight, being able to one clique + keyboard is a world of difference to me.