[REQ]'Surface' command does not close Navmap

A very minor thing, but ultimately annoying because of the grand scheme of it.

When viewing the Nav map in time compression, the command to Surface immediately closes the map, resets you to first person view wherever you previously were, and sets time compression to 1x (or something very low).

All other commands can be executed from the Nav map in time compression without this "kick out".

This is extremely tedious, because when I'm in high TC on the surface on long transit or on an uneventful patrol, I like to quickly pop to periscope depth for a quick hydrophone listen. As it stands now, every time I hear nothing and want to pop back to the surface, I get kicked from my map view, have to re-enter the Navmap and set my time compression again.

Now consider in high TC transit I may do the pop down to periscope depth every minute or so of real time...and you can understand that this dynamic is extremely annoying.

Can someone release a quick mod, or maybe even tell me which line of code to change myself?