[gtk] (8 commits) Non-fast-forward update to branch wip/baedert/css-values

[Timm Bäder <baedert src gnome org>]

The branch 'wip/baedert/css-values' 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:

  d2d04f2... Remove GtkCssRgbaValue
  2d570ee... cssimagefallback: Don't compute new image if only a color i
  8454eb1... cssimagelinear: Use count+array for the color stops, not GA
  bb0983f... cssimagelinear: Don't compute new image if it didn't change
  264b067... cssimageradial: Use array + length instead of GArray
  088201c... cssimageradial: Avoid computing a new image if it didn't ch

Commits added to the branch:

  801f950... Remove GtkCssRgbaValue
  b056b1c... cssimagefallback: Don't compute new image if only a color i
  50c889f... cssimagelinear: Use count+array for the color stops, not GA
  bca9ea3... cssimagelinear: Don't compute new image if it didn't change
  e282e4c... cssimageradial: Use array + length instead of GArray
  1b6d71b... cssimageradial: Avoid computing a new image if it didn't ch
  33ebdd7... gl renderer: Look at shadow color in the outset shadow cach
  35de78c... csscolorvalue: Don't copy rgbas when applying function