v0.8.4

This version brings an updated interface and scheduler, contributed by @real-yfprojects as
well as many other improvements. Thanks to everyone who contributed!

Major changes:

• Improve UX and HIG-conformity. By @real-yfprojects (#1176)
• Rewrite scheduler logic. By @real-yfprojects (#1204)

Other improvements:

• Change default returncode for log. By @real-yfprojects (#1193)
• Update next backup time label. By @real-yfprojects (#1180)
• Support new borg compact command (#1205)
• Change keyring label to improve UX on Gnome. By @real-yfprojects (#1181)
• Add missing translate strings. By @delfino-nunez (#1229)
• Fix setting a timer value too large for C++ int. (#1230)
• Add missing translation marking. By @delfino-nunez (#1240)
• Use accept-new for host keys. By @delfino-nunez (#1238)
• Properly set dialog titles. By @delfino-nunez (#1246)
• Use fnmatch for exclude patterns. By @real-yfprojects (#1253)
• Add a button to mount full repository. By @real-yfprojects (#1257)
• Clarify enable_background_question label. By @real-yfprojects (#1262)
• Improve SecretStorage locking behavior. By @Aeysol (#1255)
• Set repo stats to N/A after delete or prune. By @real-yfprojects (#1251)
• Improve keyring logging. By @real-yfprojects (#1263)
• Better diff selection without extra dialog. By @real-yfprojects (#1235)
• Add support for special file types in borg diff output. By @real-yfprojects (#1265)