The server and LAN browsers name each visible row's map every frame
(map_display_name), and the lobby shows its map every frame
(lobby_map_show). Both went through ui_widget_port_multiplayer_maps,
which also reads the map used last from z:\lastmpmp.txt. Until a game has
been hosted there is no such file, and each failed read also writes two
lines to debug.txt. The map used last is now looked up only when the
caller asks for it (last_used not NULL), as the menus that open a map
list do.
profile_name_show read the last-used profile at most once a second when
the read worked, but read one that could not be read again every frame.
That one is now tried again a second later too.
Co-Authored-By: Claude <noreply@anthropic.com>
