[gnome-control-center] (45 commits) Non-fast-forward update to branch wip/jsparber/background

[Julian Sparber <jsparber src gnome org>]

The branch 'wip/jsparber/background' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  201f4f0... user-accounts: Prevent crashes if current user is not in ca
  1553a81... background: change margin around background preview to 16
  65476b1... background: add buttons on bottom of gallery without functi
  ca21c6c... background: fix border on top of the gallery and add ids fo
  0d89fa2... background: add handler for "Photo" and "Files" button
  e0ac4a8... background: clean up and fix build warnings
  430d70b... background: clear settings object in dispose
  5581502... background: resize preview when the window size is less the
  dbddcdc... background: add slide icon to time changing wallpapers
  8b2a9e6... background: add space around slide icon
  59c2bb6... background: change margins for preview to 16px
  de0df9b... background: change size of preview when panel is heigher th
  b5e4c38... background: resize thumbnail to fill space a row
  18ec8be... background: change gallery wallpaper size
  43e05a7... background: use same margin size everywhere around the flow
  73dc04c... background: add icon for with time changing wallpapers
  3a7393c... background: moved gallery item code to grid-item class
  db6210b... background: add white space around gallery, set min itmes p
  cac6304... background: set max children for line to 5
  52670fc... background: set wallpaper and lockscreen
  9acf346... background: fix code style issues and remove commented code
  bd42527... background: fix build warning by casting obj to gtkWidget
  81c9629... background: remove private struct of cc-background-store
  b057210... background: remove CcBackgroundStore constructer
  5ecc098... background: make cc_background_grid_item_set_ref static and
  c025c4a... background: change name cc_background_grid_item_get_ref
  9eb8204... background: less exposure of the the wallpaper store
  c3f7cb4... background: change base obj of CcBackgroundGridItem
  df9a7c6... background: CcBackgroundGridItem::new returns its own typ
  07f939e... background: cache tumbnail for wallpaper gallery for a redr
  5061523... background: changed variable names and small style changes
  ba02248... background: cache slideshow-emblem icon
  7340153... background: show only top border for gallery view
  139fef6... background: remove chooser gallery from meson.build (needs 
  a621f12... background: adapt meson.build for file changes
  b0f9010... background: remove old source files and images form git
  4191657... background: change description for open in File and open in
  a66a102... background: fix merge mistakes created during rebase
  f644907... background: fix crash of g-c-c by opening gnome-photos
  b35dca0... background: use autoptr where possible
  8b68fe6... background: remove bg-source and bg-wallpapers-source files
  51e482b... background: fix code style and spaces
  22fa770... background: fix code style: remove empty line
  52ed269... background: add Julian Sparber as author to cc-background-p
  9aafc41... background: fix build warning: set slideshow_emblem to NULL

Commits added to the branch:

  28c2205... background: start implementing the new design for the backg
  5fd663e... background: change margin around background preview to 16
  f1c961d... background: add buttons on bottom of gallery without functi
  a278d64... background: fix border on top of the gallery and add ids fo
  da369b4... background: add handler for "Photo" and "Files" button
  bbc3ad0... background: clean up and fix build warnings
  2be0935... background: clear settings object in dispose
  1ad1ee4... background: resize preview when the window size is less the
  328ed67... background: add slide icon to time changing wallpapers
  8c73031... background: add space around slide icon
  6dfebc2... background: change margins for preview to 16px
  5fac958... background: change size of preview when panel is heigher th
  cae001f... background: resize thumbnail to fill space a row
  7b8f361... background: change gallery wallpaper size
  d3ae987... background: use same margin size everywhere around the flow
  e7da3e6... background: add icon for with time changing wallpapers
  aab28bb... background: moved gallery item code to grid-item class
  636e9db... background: add white space around gallery, set min itmes p
  ae88503... background: set max children for line to 5
  a33571b... background: set wallpaper and lockscreen
  ec836de... background: fix code style issues and remove commented code
  70e0b73... background: fix build warning by casting obj to gtkWidget
  a4f4f5a... background: remove private struct of cc-background-store
  aa371a8... background: remove CcBackgroundStore constructer
  7241197... background: make cc_background_grid_item_set_ref static and
  1e02b08... background: change name cc_background_grid_item_get_ref
  00baaeb... background: less exposure of the the wallpaper store
  ec00a15... background: change base obj of CcBackgroundGridItem
  975e10b... background: CcBackgroundGridItem::new returns its own typ
  1114551... background: cache tumbnail for wallpaper gallery for a redr
  220710a... background: changed variable names and small style changes
  33c1154... background: cache slideshow-emblem icon
  288f7f4... background: show only top border for gallery view
  b0c2280... background: remove chooser gallery from meson.build (needs 
  e6ebb34... background: adapt meson.build for file changes
  7c9c939... background: remove old source files and images form git
  8317187... background: change description for open in File and open in
  9286cfe... background: fix merge mistakes created during rebase
  b3e8648... background: fix crash of g-c-c by opening gnome-photos
  cbedd84... background: use autoptr where possible
  723248f... background: remove bg-source and bg-wallpapers-source files
  0386958... background: fix code style and spaces
  711f875... background: fix code style: remove empty line
  f66bf6c... background: add Julian Sparber as author to cc-background-p
  692ecd5... background: fix build warning: set slideshow_emblem to NULL