[gtk/matthiasc/for-master] (6 commits) ...css: Fix an oversight in style change computation

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  7027fc9... Make it easy to recognize initial style values (*)
  7fbb37a... background: Don't render initial backgrounds (*)
  5faf977... border: Don't render initial borders (*)
  27223f7... Merge branch 'initial-style' into 'master' (*)
  8be6159... Add a cursor-aspect-ratio setting (*)
  abce542... css: Fix an oversight in style change computation

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