update playback marker when selecting playback position.

reenable playback dismiss with menu button, the system no longer triggers dismissal since the tap gesture recognizer consumes the menu event.

VLC for Apple TV/VLCFullscreenMovieTVViewController.m

@@ -169,6 +169,7 @@
     VLCPlaybackController *vpc = [VLCPlaybackController sharedInstance];
     VLCTransportBar *bar = self.transportBar;
     if (bar.scrubbing) {
+        bar.playbackFraction = bar.scrubbingFraction;
         [vpc.mediaPlayer setPosition:bar.scrubbingFraction];
         [self stopScrubbing];
     }
@@ -183,6 +184,8 @@
         }];
         [self updateTimeLabelsForScrubbingFraction:bar.playbackFraction];
         [self stopScrubbing];
+    } else {
+        [self dismissViewControllerAnimated:YES completion:nil];
     }
 }