Mod updates should show total download percentage

[mrvn]

When you update the game from 0.17.58 to 0.17.78 the progress bar goes once from 0% to 100% downloading a bunch of files. It shows the total progress.

When you update mods on the other hand the progress bar goes from 0 to 100% for each mod separately. And some mods take seconds to download, other minutes. So the overall progress is basically impossible to judge.

Please add up all the mod sizes and show the combined progress when updating mods.