freeroam: Map key bind interferes with race editor help

[dnl-k]

Which resource(s) have this problem?
freeroam, editor / race

Describe the bug
4083f3a Added F2 to show the map in the freeroam resource. The race editor help thingy in the race gamemode uses F2 as show/hide. Since the editor relies on freeroam and both need to be present at the same time, a different key for either the map or the help thingy should be considered.

To Reproduce

1. Start your local map editor
2. Start a map with the race gamemode
3. Try hiding the help thingy by pressing F2
4. It'll show the map.

Expected behavior
One key shouldn't be bound to two functions.

Version
1.6