Fixes #4200, revised rest of @api classes/methods, closing ticket.
Fixes #4263, make sure GeoIPAutoUpdater forces new scheduled time of update task to be persisted when update period is set.
Fix tests
Merge remote-tracking branch 'origin/master'
Fixes  #4368 Add support transparent background custom logos. Was Pull request #148, kuddos ademaro
Updating latest otrance translations before Release Candidate
Restoring translator credit earlier removed by mistake. Kuddos for great work on the Persian translation!