"Use switch" prompt always assumes player is using a controller

Description

When the player approaches a switch, a prompt appears at the bottom center of the screen, telling the player how to use the switch. Currently, it says "Press X", which doesn't hold true for players who are using a mouse and keyboard.

Version

0.005

Steps to reproduce

1. Move to an operable switch.
   
2. Expect to see a platform-sensitive prompt (keyboard bindings for PC, buttons for controllers) for using the switch.
   
3. Observe that the "Press X" prompt appears at the bottom center of the screen.
   

I was going to make a mention of this myself.

I felt that an "USE ACTION BUTTON" would be a bit more suitable.