New Steam Beta fixes Preview update issues on Steam Deck and other Steam fixes

For Steam Deck users if you've had issues updating on Preview / Beta, this one is for you. There's also a few general fixes for all Steam users.

The changelog is the same across desktop and Steam Deck:

General

• Fixed an issue preventing SteamOS from updating from version 3.6.7 when opted in to the 'Preview' update channel.
• Fixed errors while displaying certain collections for some users.
• Fixed mispositioned background glow on game capsules in grids.
• Fixed error when entering multiple words into search box

Desktop Mode

• Fixed "Soundtracks" and "All Games" shelves on home page applying the app type filter from the top of the games list. This would lead to Soundtracks showing no items if Soundtracks was not selected at the top of the games list, as an example.

The issue mentioned above for the SteamOS update problem was noted in the SteamOS 3.6.8 Beta release.