Added features (by Buggler)

- 'Ctrl+Tab' for next tab in Enhanced Description Box at Strategic & Tactical Screen ('Tab' also possible in Strategic Screen as previously not in used)
- 'M' for Multiplayer in Main Menu Screen

git-svn-id: https://ja2svn.mooo.com/source/ja2/trunk/GameSource/ja2_v1.13/Build@5668 3b4a5df2-a311-0410-b5c6-a8a6f20db521

MainMenuScreen.cpp

@@ -515,6 +515,12 @@ void HandleMainMenuInput()
 					SetMainMenuExitScreen( INIT_SCREEN );
 					break;
 
+				case 'm':
+					gbHandledMainMenu = NEW_MP_GAME;
+					gfMainMenuScreenExit = TRUE;
+					SetMainMenuExitScreen( MP_JOIN_SCREEN );
+					break;
+
 				case 'i':
 					SetPendingNewScreen( INTRO_SCREEN );
 					gfMainMenuScreenExit = TRUE;