load SmallVideoTimelineImage overlay async and update in BlockVideoTimeline once loaded

source/Ox.UI/js/Video/BlockVideoTimeline.js

@@ -160,6 +160,8 @@ Ox.BlockVideoTimeline = function(options, self) {
             subtitles: Ox.clone(self.options.subtitles, true),
             type: self.options.type,
             width: Math.round(self.options.duration)
+        }).bindEvent({
+            loaded: updateTimelines
         });
     }