Fixed updating team-slide in PartyNameSelection

VocaluxeLib/Menu/CMenuPartyNameSelection.cs

@@ -593,6 +593,7 @@ namespace VocaluxeLib.Menu
                 }
             }
             _UpdateButtonState();
+            _UpdateTeamSlide();
         }
 
         public void DecreaseTeamNum()
@@ -603,6 +604,7 @@ namespace VocaluxeLib.Menu
             if (_NumTeams - 1 >= _PartyMode.MinTeams)
                 _NumTeams--;
             _UpdateButtonState();
+            _UpdateTeamSlide();
         }
 
         public void IncreasePlayerNum(int team)