v0.4.2-ls54

LinuxServer Changes:

Rebasing to alpine 3.12.
Medusa Changes:

Improvements

• Added new page "restart", for restarting and shutting down medusa (8399)
• Added new page "update", for updating medusa to a new version (8437)

Fixes

• Fix show-selector using the show lists (8426)
• Fix home poster layout. Re-add the search by show title (8415)
• Fix backlog search ignoring cached search results (8395)
• Fix guessit parsing numbered episode titles as multi season (8413)
• Fix History page showing black text (on black) when using dark theme (8375)