getSectionByLetter

[ukdtom]

Allow backend to return contents based on first letter in a section

Depending on #148

[ukdtom]

Backend fix 15a5179

See the docs

[dagalufh]

Question; Is paging still needed?
Or can i fetch all items for one letter all at once?
Perhaps i can fetch everything instantly, but only fetch subtitles for those that are on screen?

If we have paging, it will be like A1, A2, A3 meaning that it's still not smooth to find specific item.
I'm more keen on not having paging more than first letter...

[dagalufh]

I'm almost done with a PoC for you @ukdtom. It will probably be done by the time you get tired of your vacation.

[dagalufh]

I've done a PoC, but I need some clearification from you.

[ukdtom]

Ready here for incoming fire ;-)

[ukdtom]

All done, and checked in