While you guys are free to choose itch.io or Patreon to support me and make this feature a priority, I guess this would also be a good time to use Bountysource. I've set a $200 bounty goal at https://www.bountysource.com/issues/47007415-gamemaker-studio-2-support.
Just note that I have no time to work on Tiled at all this month since we're about to move to a new place and there's a lot of work remaining to be done even apart from moving all our stuff. I expect to be back on Tiled as usual by the 5th of March.