Global instance attemps

Suggestions
1

Imported from legacy Flarum.
Original author: Okami (Flarum #104)

Be able to do instance multiple times with a single character based on how many charecter on the account have the requeriments to do it or already done it at least once. It would avoid the trouble of moving gears and characters every time we would like to do an instance multiple times.

2

Imported from legacy Flarum.
Original author: PlayOnly (Flarum #1284)

i just think about this but a little bit different

not every one really wiling lvling dozen of the same char for this. how about cap the attempt on master account ?