Fixed category labels not being populated

[wes-otf]

Description

Fixes #3741. Adds a new tag to get the label of the category from the ID

Test Steps

• Navigate to the beta view
• Select a new category to filter on
• When a chip pops up to indicate an active category filter, ensure it is the same as the label that was previously selected, not a number.

[frjo]

I think this PR look good but the feature over all is not useful it its current state. See #3269

I do not think category filtering active on OTF live?

[wes-otf]

@frjo Ah that issue is new to me. It works on live with categories that have lower numbers of submissions but I am seeing that SystemExit with other categories.

[theskumar]

Looking at the Traceback, the SystemExit seems to be a performance issue trying to filter by category, we can have another ticket to resolve that, the filter by category which uses django-filter should be optimized so it doesn't loop-over all the submissions, trying to find and filter by category individually. I can take a stab at it.

[theskumar]

This looks good, but would generally suggest dealing with it in view.py code itself, that way it's easier to fetch all the category names once, instead of here it will 5 db calls if there are 5 categories selected, just to get the names of all the 5 categories.

I generally see template tags causing hidden db queries.

[wes-otf]

Makes sense! I was actually trying to figure out if I could cache the result of the initial query somehow but popping the login into view.py might make things easier.

[frjo]

@theskumar Would be really nice if you can improve the performance of the category query. I can see how this filter can be useful for staff.

[wes-otf]

that last push should be a lot more efficient ^

[theskumar]

💯