Don't persist letter filter when querying

[viown]

Currently, the letter filter will only be persisted in some media types if you first select a letter, then use 'sort' or 'filter' (which calls save). In other media types like shows it's saved when items are loaded.

Changes
To stay consistent, prevent the letter filter from being saved anywhere.

Issues
Fixes #6263

[jellyfin-bot]

Cloudflare Pages deployment

Latest commit	18ea570
Status	✅ Deployed!
Preview URL	https://543c3be2.jellyfin-web.pages.dev
Type	🔀 Preview

View build logs

[viown]

I just noticed that If someone has an active letter filter and they used this, they wouldn't be able to get rid of the filter unless they cleared cache. To circumvent this, I'll remove these fields in loadQuerySettings as well.

[viown]

Hmm, wondering if it's better to 'whitelist' certain query fields instead.

[thornbill]

That was the previous approach... 7074d41

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[aaemon]

btnShuffle, btnSelectView, btnSort, btnFilter, and alphaPicker are all persistent across different devices. So, trying to use a filter on one device messes up all other devices connected to the same account.

[viown]

btnShuffle, btnSelectView, btnSort, btnFilter, and alphaPicker are all persistent across different devices. So, trying to use a filter on one device messes up all other devices connected to the same account.

The settings are indeed server-side. To match previous behavior, we can make sorting work across devices but keep filtering local to each device. It's better that we do this in another PR.