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

Strategic/mapscreen.cpp

@@ -7089,6 +7089,22 @@ void GetMapKeyboardInput( UINT32 *puiNewEvent )
 					StopAnyCurrentlyTalkingSpeech( );
 					break;
 
+				case TAB:
+					// go to next tab in enhanced description box
+					if( InItemDescriptionBox( ) && gGameSettings.fOptions[ TOPTION_ENHANCED_DESC_BOX ] == TRUE )
+					{			
+						if ( gubDescBoxPage < 2 )
+						{
+							gubDescBoxPage++;
+						}
+						else
+						{					
+							gubDescBoxPage = 0;
+						}
+						HandleItemDescTabButton( );
+					}
+					break;
+
 				case F1:
 				case F2:
 				case F3: