Feature IDea: Make it possible to Update Mods without starting celeste

[DriesMoo]

With the amount of mods some there are and the fact that they can be very big and slow down start times it would be nice to be able to check for updates and download the new ones in olympus before starting Everest.
So basically an "Update all mods" button.

[LuneAres]

That's here now, so this issue can probably be closed.