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/Editor.cs

@@ -524,6 +524,7 @@ namespace HeavenStudio.Editor
                 GameManager.instance.OverlayCamera.rect = new Rect(0, 0, 1, 1);
                 EditorCamera.rect = new Rect(0, 0, 1, 1);
             }
+            Timeline.AutoBtnUpdate();
         }
 
         private void UpdateEditorStatus(bool updateTime)