v0.8.5 stable

• Updated translations by eson57
• Several improvements to caching
  • support any file extension
  • removed Pillow dependency
  • broken images are now manually downloaded from QML without caching
  • support all animated assets (currently only used in modern overview and custom emojis)
• Fixed last opened server not re-opening sometimes
• Last opened server is now scrolled to in the server list
• Server icon is now animated in modern overview when selected
• Updated discord.py-self to a newer version which works fine with python 3.8
• Switched and adapted to pyotherside_utils libraries
• Removed requests dependency
• improved disconnecting
• some changes to paged attachments view
• some fixes for references
• some ignored discord errors are now shown
• ensure httpx and requests libraries are never used for downloading (for example when starting without Sailjail) so stuff doesn't break
• logs now gave error summaries
• an error is shown if downloading or sharing an attachment failed
• attachments are now proxied through nearby proxy server (like cloudflare)
• when downloading a file which already exists, a suffix with a number is added