[Feature] Show both long and short mapname in the menus

[The-Gig]

This regards both Classic UI and UI3.

At the moment, Classic UI menus only show the short mapname (BSP file name), while UI3 shows only the long filename (from the .arena file, if available). I think that for a better experience, players should somehow be informed of both.
Note: Classic UI actually shows both names in Single Player Deathmatch "unlock tiers" mode, but only the short one in Skirmish or Server Create mode.

Maybe an on/off flag to switch between the two views? A mouseover hint so when you are over the name or the levelshot of the map, you can read the other one somewhere in the page? (Maybe previous/next page might be moved to the edge to make room?) Else?