This release marks the point for a few big features to be useable. The
recursive icon lookup is marked stable and is used by default for new users. It
is now also possible to add gaps between notifications, although it is not done
with separate windows, so clicks in between notification will not register to
the below window. You'll also need a compositor for the transparancy to take
effect.

Added

• override_dbus_timeout setting to override the notification timeout set via
  dbus. (#1035)
• Support notification gaps via the gap_size setting. Note that since the
  notifications are not separate windows, you cannot click in between the
  notifications. (#1053)
• Make min_icon_size and max_icon_size a rule for even more flexibility
  (#1069)

Changed

• The window offset is now scaled according to scale as well. This way
  notification stay visually in the same place on higher DPI screens. (#1039)
• For the recursive icon lookup, revert to using min_icon_size and
  max_icon_size instead of icon_size. min_icon_size is used as the size to
  look for in icon themes. This way of defining icon size is more flexible and
  compatible with the old icon lookup. The new icon lookup should now be
  superior for all use cases. (#1069)
• Recursive icon lookup is no longer experimental.
• Recursive icon lookup is enabled in the default dunstrc. This does not change
  your settings when you have a custom dunstrc.

Fixed

• Added back the action_name setting that was accidentally dropped. (#1051)
• Broken dunstctl history. (#1060)
• Merged a few wayland fixes from mako (https://github.com/emersion/mako)
  (#1067)
• follow=keyboard: Fix regression where we don't fall back to mouse (#1062)
• Raw icons not being scaled according to icon size (#1043)
• Notifications not disappearing. For some people notifications would sometimes
  stay on screen until a new notification appeared. This should not happen
  anymore (#1073).

Merged pull requests

• Rule attribute to override timeout set by dbus by @rpbranco in #1038
• Scale offset according to DPI by @livanh in #1039
• Fixes dunstctl history command by @stremlenye in #1060
• Add support for notification gaps by @paddyw2 in #1053
• Mako wayland fixes by @fwsmit in #1067
• follow=keyboard: Fix regression where we don't fall back to mouse by @cdown in #1062
• Recursive icons: Use min_icon_size and max_icon_size instead of icon_size. by @fwsmit in #1069
• Fix notifications sometimes not disappearing by @fwsmit in #1073

New Contributors

• @rpbranco made their first contribution in #1038
• @livanh made their first contribution in #1039
• @stremlenye made their first contribution in #1060
• @paddyw2 made their first contribution in #1053

Full Changelog: v1.8.1...v1.9.0