DS-1100 Migrate schedules fix to main repo

[froboy]

@podarok if you create a new branch, we can merge this into the source repo on a separate branch, then it's not as fragile a connection.

from https://github.com/seattleymca/openy_repeat/tree/YGSSLA-396

[rollki]

@froboy For one of the clients, we can observe a problem with duplicate categories in the left side.

Actuallyб the problem is wrong content management, as someone created 2 or more categories (activity CT) with the same title (one of which with an empty subcategory field) that's why the query returns 2 records with the same title, and later vuejs renders it and perceives it as one and the same, since the keys are different, but the values are the same.

Theoretically, the problem can be solved on the side of content management, but it is probably better to use distinct and prevent such cases.

I don't think we can solve both problems, as we can only solve the technical side.

Solution: $query->distinct(TRUE);

[rollki]

@froboy If you agree with the decision, I propose to do it in this PR :) But we can discuss it of course

[froboy]

@rollki sorry I missed this. I've added that fix.

[podarok]

https://github.com/ynorth-projects/openy_repeat/tree/schedules_fix @froboy