ParseProgressItems indexes stores ALL challenges

[dev-brendanprice]

This is an issue because when we need to use a count of available (completable) challenges, within a week, the function will store ALL the challenges in the season.

This value is going to be used to check for the potential to earn XP. For example, if there are no bounties present and the user has completed all their seasonal challenges, then this means their potential to earn XP is technically zero. (as far as Synergy is concerned anyways).

Just cross-reference each seasonal challenge back to its node definition, where the current week is stored to get the amount of currently-completable challenges. Store the value in a new variable.