feat: rework Pause

Now a dialog.

* Also fix the new BetterGiveUp panic restart
* Also move SortByInternal's PNG away from the root namespace

Enhancements/Pause/MU3.Sound/patch_SoundManager.cs

@@ -1,9 +1,8 @@
 namespace MU3.Sound;
 
 class patch_SoundManager: SoundManager {
-    private extern HandleInfo orig_getHandle(Priority priority);
-    private HandleInfo getHandle(Priority priority) => orig_getHandle(priority);
     private patch_SoundPlayer[] _soundPlayers;
+
     public void pause(HandleInfo handle, bool val) {
         if(handle.Index < _soundPlayers.Length) {
             _soundPlayers[handle.Index].pause(val);