3.5.5
=====
* Update style to match mockups [Allan]
  - improve calendar layout and legibility
  - update notifications and menus
  - use a common style for entries
  - update scrollbars to match GTK+
  - improve clock/unlock button in lock screen
  - update polkit dialogs [Jasper]
* Fix login dialog growing when selecting different users [Florian; #675076]
* Implement screen lock in the shell [Giovanni]
  - restructure login code to be shared with session unlock [#619955]
  - add initial screen shield / unlock dialog implementation [#619955]
  - implement (optional) notification list on lock shield [#619955]
  - update login dialog style to match lock screen [#619955]
  - filter notifications to only show new ones on the screen lock [#681143]
  - make notifications scrollable if necessary [#681143]
  - use correct application names in notifications [#681143]
  - allow to return to the shield by pressing Escape [#681143]
* Minor login dialog improvements [Florian]
  - update style to match the overall visuals [#660913]
  - indicate whether users are logged in [#658185]
* Add support for background-repeat CSS property [Jasper; #680801]
* Add :active pseudo class on scroll handles [Florian]
* Remove markup from translated strings [Matthias; #681270]
* Misc bug fixes and cleanups: [Alban, Florian, Giovanni, Jasper, Jeremy,
  Matthias, Piotr; #677893, #679944, #680064, #680170, #680216, #680426,
  #681101, #681382]

Contributors:
  Jeremy Bicha, Alban Browaeys, Giovanni Campagna, Matthias Clasen, Allan Day,
  Piotr Drąg , Florian Müllner, Jasper St. Pierre

Translations:
  Matej Urbančič [sl], Tom Tryfonidis [el], Yaron Shahrabani [he],
  Kjartan Maraas [nb], Baurzhan Muftakhidinov [kk], Praveen Illa [te],
  Khaled Hosny [ar], Daniel Mustieles [es], Gabor Kelemen [hu],
  Fran Diéguez [gl], Sweta Kothari [gu], Aleksej Kabanov [ru],
  Nilamdyuti Goswami [as], Arash Mousavi [fa], Мирослав Николић [sr, sr@latin]