Update cache for individual mods

[Buckminsterfullerene02]

For the length of my mod list the update cache process takes multiple minutes and usually it's just one mod I actually care about getting an update for.

Also, don't think I should make a seperate issue for such a minor thing, but wouldn't you agree that "Update mods" is a more user friendly name for the button? It's not exactly clear to most users that updating the cache would be checking for updates/updating your mods. I know it's got the hover text but I still believe that mentioning a technical word when it doesn't need to be mentioned isn't the best 🙂