Fix/reset turn

[Eryx5502]

There are some small changes on the rollInitiative function:

1. The reason why the active PC wasn't the one with highest initiative after rollInitiative on a new round was because the updateTurn parameter. It defaults to true, which means the turn must be updated such that the active player isn't changed by rollInitiative. Defaulting to false does the trick.
2. When refreshing the page, the initiative of some PC was randomly reset. I think awaiting for super.rollInitiative for all ids solves this issue.
3. When given a string as ids, we were iterating through its letters which is not the intention.

[Linkaynn]

@Eryx5502

Nice bug catch!

LGTM!