This is a development release.
- Fix inhibiting xfce4-screensaver (Bug #16364)
- Fix indentation (makes git blame harder, but code more readable)
- settings: Unclutter system and display tabs
- settings: Move % sign out of spinbutton (Bug #15994)
- Switch to symbolic window-close icons
- Dismiss critical notification when connecting to AC
- Make brightness steps configurable (Bug #12062)
- Allow compilation with panel 4.15
- panel-plugin: Properly show 'About' menu item
- panel-plugin: Add (optional) Presentation mode indicator (Bug #15773)
- panel-plugin: Toggle presentation mode on middle click
- panel-plugin: Add warning color to presentation mode indicator
- panel-plugin: Use GtkSwitch for Presentation mode
- panel-plugin: Replace deprecated call
- systray: Ensure presentation mode can be toggled (Bug #16337)
- Translation Updates:
  Albanian, Arabic, Belarusian, Catalan, Chinese (China), Chinese
  (Taiwan), Croatian, Czech, Danish, Dutch, Finnish, French, Galician,
  German, Greek, Hebrew, Italian, Japanese, Kazakh, Korean, Lithuanian,
  Malay, Norwegian Bokmål, Portuguese, Portuguese (Brazil), Russian,
  Serbian, Slovak, Slovenian, Spanish, Turkish