Reveal the Backspace shortcut in the UI
Since the Back action already has two standard shortcuts, a third one appended to the list will be invisible in the UI, which can show only two. This leaves users unable to reassign or remove it. (A common problem, as some people prefer Backspace to navigate Up.)
We therefore make it the first shortcut in the list, so that the hidden third entry will be the dedicated Back button, which users are far less likely to want reassigned.
Edited by Forest ix