修改本体，添加CrossTrackPoint兼容层，兼容StaticTrack Hold，为难度选项扩增全屏可选，添加和调整某些谱面

Signed-off-by: TRADER_FOER <lhf190@outlook.com>

Assets/Scripts/UI/SongSelection/DifficultySelectionContainer.cs

@@ -8,7 +8,7 @@ namespace Ichni.Menu
     {
         public List<DifficultySelectionButton> buttons;
         public DifficultySelectionButton selectedButton;
-        
+
         public void SetUp(List<DifficultyData> difficulties)
         {
             int difficultyCount = difficulties.Count;
@@ -24,13 +24,13 @@ namespace Ichni.Menu
             }
 
             SongSelectionRecord songSelectionRecord = MenuInformationRecorder.instance.GetRecordOfThisChapter();
-            
+
             if (songSelectionRecord.difficultyIndex >= difficultyCount)
             {
                 songSelectionRecord.difficultyIndex = difficultyCount - 1;
             }
-            
-            buttons[songSelectionRecord.difficultyIndex].Select();
+
+            buttons[songSelectionRecord.difficultyIndex % buttons.Count].Select();
         }
     }
 }