Update release date

First beta release for Lutris 0.5.9

  * Add initial support for Epic Games Store
  * Add support for Steam for Windows as a game source
  * Add support for DXVK-NVAPI and DLSS
  * Add FidelityFX Super Resolution (FSR) option for compatible Wine versions
  * Add workaround for locale issues when Lutris is launched from Steam
  * Add gamescope option
  * Lutris games can now be launched from Steam
  * 3rd party services can be enabled or disabled in the preferences
  * The main preferences window has now tabs on the left side
  * Runner configuration is now available from the main preferences window
  * VKD3D is a separate option from DXVK
  * Esync is enabled by default
  * Dolphin is available as a game source (reads games from the emulator's
    local database of games)
  * Scan for installed games when using Steam source
  * Improved automatic installers for GOG, detection of DOSBOX and ScummVM
    games.
  * DRM free services (Humble, GOG) can locate existing installations of games
  * Use 7zip as the default extractor when not given an archive type
  * Improve process monitoring, allowing for monitoring of Steam games
  * Disable AMD switchable graphics layer by default (breaks games)
  * Removed support for Gallium 9
  * Removed support for X360CE
  * Removed legacy WineD3D options

Add changelog for 0.5.8.4

Fix pylint warnings

Add changelog for 0.5.8.2

Run run_all_checks in the main application to get output

Update release date

Reorder imports

Move 'Show tray icon' to Preferences