Spell effects applied during pause show magnitude 0

Related to #9147 (closed)

When adding spell effects during pause, for example by drinking a potion or eating the ingredient or via lua, the magnitude of applied effect shows 0 until unpause.

To reproduce, open an inventory, drink or eat something, and look at the status effects.

Happens on 0.51 and master.

Doesn't happen in Morrowind.exe due to effects not applying during pause at all.