Major changes in 3.31.92:
- Add an error message when file is encrypted, or empty,
  or DVD playback is attempted with missing libraries
- Make "Stop" keyboard button act like the Stop button on a
  CD player
- Remove all mentions of the external chapters plugin, it wasn't
  used since 2012
- Fix possible crash when browsing
- Fix DesktopEntry in MPRIS plugin
- Translation updates