Add main mesh fixes

Assets/Asset Cleaner/Data/PrevClick.cs

@@ -0,0 +1,18 @@
+using UnityEngine;
+
+namespace Asset_Cleaner {
+    public struct PrevClick {
+        const float DoubleClickTime = 0.5f;
+        Object _target;
+        float _timeClicked;
+
+        public PrevClick(Object target) {
+            _target = target;
+            _timeClicked = Time.realtimeSinceStartup;
+        }
+
+        public bool IsDoubleClick(Object o) {
+            return _target == o && Time.realtimeSinceStartup - _timeClicked < DoubleClickTime;
+        }
+    }
+}