Merge donated dark spell

When you receive a dark spell the current overview shows where spells are from.
When going into battle if you have the dark spell of the same level they should combine.

Would make it 1 less spot to have to scroll over too. Make it easier to use 4eq. Or a double poison when one of those has been received from clan

I'd agree with this, especially with the EQ spell.

Yeah it isn't too much hassle but it would be helpful if I could just tap 4 earthquakes instead of needing to hit another slot