fix(front): Fixed sorting when grouping leaderboards

[GordiNoki]

Closes #1084

Makes sorting for leaderboard grouping definitive. Looks like chrome and firefox array sort implementations are a bit different, where first and second argument for sort function are switched. The issue is not just with firefox and based on how leaderboards are sorted initially when created (which is also affected by what browser map is submitted from)

Screenshots (if applicable)

Checks

• !! DONT IGNORE ME !! I have ran nx run db:create-migration <name> and committed the migration if I've made DB schema changes
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[tsa96]

Weird, had no idea ECMA spec was so loose on this.