Fixed a bug where the general portrait in custom battles was using the unit card and not the porthole

Grail Pilgrim skill gives Frenzy

Grail Pilgrim skill no longer buffs all squires/pilgrims in the army
Grail Pilgrim skill gives +5 leadership down from +9
Grail Pilgrim skill no longer gives +3 Melee attack

Monster Slayer Trait gives +2 Chivalry per turn
Monster Slayer Trait gives +6% weapon strength up from +4%
Monster Slayer Trait gives +15 bonus versus large, down from +24

Developer thoughts:
Grail Pilgrim was always the worse choice compared to Master-at-Arms... unless your army was filled with Foot Squires and Pilgrims and then it was honestly way too powerful, especially if stacked more than once between multiple Sergeants. The new version, giving frenzy, makes it really powerful but not so much so that it invalidates Master-at-Arms (which is still really good) and no longer has a broken use case.

Monster Slayer gave way too much bonus versus large. Not much to say.