Warn when casting a summon at cap

[PlatinumSpider]

Currently when you cast a summon spell when you are already at cap for the summon you just replace one of the summons, this can result in accidental overcast if you don't know the cap. I'd like to see a warning with a do you want to continue prompt the first time you try to overcast. That way you get the warning at first but if you want to shuffle through a summon list to get the right ally you still can.

[Shtopit]

Well, it also allows you to refresh your summon, so it isn't actually a purely useless or deleterious action.

[Siegurt]

Well, neither is attacking unarmed, but there's a warning for that.

I would say a y/n warning that can be suppressed via option would be fine.