Import from NMM

[rmm200]

I voted for a couple.

The only thing important to me is don't let the user destroy his mods.

Refuse to do the import if any traces of NMM are present in the game directory. Numbered folders, etc.

And never merge back changes that result in a null mod. If there is nothing left - warn the user and delete the mod.

Nothing worse than a mod that looks valid - but is empty.