Legacy Browser Display Bug

[dcostalis]

Repro:
1) Switch to legacy browser while in "multiplayer" mode
2) Join a server
3) Leave server at any point

Actual:
1) Both the legacy browser buttons and the new browser buttons are displayed on top of each other

Expected:
1) Maniaplanet remains in Legacy Browser mode upon exit
2) OR mania planet completely reverts to New Browser mode