Fixed mod updating for at least Curse

Merged in all changes from MacTee MASTER

All fixes are related to fixing/stabilizing Mod updating.

The last mod changed date is saved to config (again? thought I had fixed this already.)
Incorporated fix the was breaking in-place mod upgrades (I found where, by MacTee told me how to fix it.)
I can verify this works like a charm!
Removed GetFileName from Curse Handler (no longer needed.)
Updated Edit Mod Info screen: Now shows changed date, and fix spacing between elements.