Editor bug fixes (#261)

* Spaceball cleanup and small bug fix

* Replace old hit sound in spaceball

* Camera filters

* added 9 new filters, including 3 types of sepia

* oops

* remark

* normalization of fade out and fade in on filters are by 100

* GenerateFilterTypeEnum comments

* Pure black and white filter

* Zooming

* Constant playback bar offset

* Prepare box selector rewrite

* Update icons, finalize

* Bug fixes

Assets/Scripts/LevelEditor/Timeline/SpecialTmeline/SpecialTimeline.cs

@@ -225,5 +225,10 @@ namespace HeavenStudio.Editor.Track
             //auto-open the dialog
             sectionTimelineObj.OnRightClick();
         }
+
+        public bool InteractingWithEvents()
+        {
+            return specialTimelineObjs.FindAll(c => c.hovering == true).Count > 0 || specialTimelineObjs.FindAll(c => c.moving == true).Count > 0;
+        }
     }
 }