VLCOpenNetworkStreamTVViewController: tvOS 11 appearance fix

Apple-TV/VLCOpenNetworkStreamTVViewController.m

@@ -43,6 +43,8 @@
 
     self.playURLField.placeholder = NSLocalizedString(@"ENTER_URL", nil);
 
+    self.previouslyPlayedStreamsTableView.backgroundColor = [UIColor clearColor];
+
     /* After day 354 of the year, the usual VLC cone is replaced by another cone
      * wearing a Father Xmas hat.
      * Note: this icon doesn't represent an endorsement of The Coca-Cola Company