[libadwaita] (22 commits) ...stylesheet: Split base and defaults

[Christopher Davis <christopherdavis src gnome org>]

Summary of changes:

  bdf1f8f... stylesheet: Remove a redundant rule from treeview (*)
  e648cec... stylesheet: Simplify needs-attention indicator (*)
  46c0cdf... stylesheet: Use accent_color for needs attention indicator (*)
  80e6203... stylesheet: Simplify transition shadow (*)
  3521f00... stylesheet: Don't vary infobar color between light and dark (*)
  8ec9a6b... stylesheet: Make drop target color follow accent (*)
  b7519c9... stylesheet: Extract window border and outline colors (*)
  d631d56... stylesheet: Drop $alt_focus_border_color (*)
  4dcd3e6... stylesheet: Remove an if() from tab bar styles (*)
  48e8c62... stylesheet: Remove an if() from color swatches (*)
  716bfbb... stylesheet: Remove notebook header background (*)
  cd5084e... stylesheet: Use header bar styling for search bar (*)
  a716b81... stylesheet: Remove $dark_fill (*)
  5bcb32f... stylesheet: Move $shade_color to _colors.scss (*)
  238acd6... stylesheet: Add .inline style class for tab bars (*)
  76f3028... stylesheet: Drop toolbar background (*)
  9fe1ce4... stylesheet: Use headerbar border for headerbar separators (*)
  13288fd... stylesheet: borders_color -> border_color (*)
  fba3458... stylesheet: Rename base/text/bg/fg_color variables (*)
  5e9d213... stylesheet: Make everything recolorable (*)
  ad13d0d... stylesheet: Stop referring to color variables from _default (*)
  7df2bde... stylesheet: Split base and defaults (*)

(*) This commit already existed in another branch; no separate mail sent