Allow assets to be re-imported#3089

Using Github (or equivalent) is useful for hosting images using a static link, especially if you want version control.
However, due to how local caching works, even if a change is pushed to Github (or equivalent), the changes aren’t represented in TTS.
I’d like there to be a way to force re-import assets using a static link (right now, the fix is to turn off mod-caching, and that only works client-side).
A possible solution could be to right click -> custom -> add a refresh button next to the folder button to re-import the asset.
Then, whenever you update the workshop, players’ games can detect whether an asset has been re-imported or not, and re-import those assets from the link for all clients.

I had an issue where I would have like this feature recently. My cloud got corrupted, so while fixing it I had a bunch of dead Steam URLs that TTS still believed to be valid (just because they were Steam links?). So it wouldn’t let me reupload the assets, because it believed them to still be valid. Luckily TTS Cloud Sync was there to save my ass, but I agree that a feature to just force a refresh/reupload would be useful.

Also, having to slightly adjust local names because the cache copy is stuck is annoying (sometimes deleting the cache copy works, sometimes it doesn’t).