Log Message:
audio/spotify-qt: update to 3.4

Fixes:
-Fixed not being able to select track title as default sort column.
-Fixed sorting tracks by track number in descending order by default.
-Fixed a crash when trying to open a track context menu when no track was found.
-Fixed the setting to always start Spotify client being ignored in some cases.

Changes:
-Artist view is now loaded asynchronously to improve performance.
-Access token is now only refreshed on start when needed, making app restarts
faster.
-Settings have been rewritten to improve performance and compatibility.
-When using automatic track list header resizing, there's now a maximum width
for columns.
-When opening an album from a track, that track is now highlighted.
-High DPI support (#51).
-Qt style can now be manually selected.
-Added an option to disable discovery when using librespot (#54).
-Redesigned dark theme that more closely resembles the Spotify theme (#47).