Overview of changes in 3.54.4

• Bugs fixed:

  • Fix Nextcloud and mailbox.org preconfiguration
    
  • Add DAV preconfig for mail.ru
    

• Translation updates:

  • Japanese (Takayuki Kusano)
    

Git-EVTag-v0-SHA512: c5df893109f65a5153f12a9e57fe6f871344e9caa1bb94a543ac8ed97e3a0514faf70a72395d222f985e44ff7e9eead83152cc2c7ddd4b41ac1e56c67a5a1c51