[gtk] (15 commits) ...Merge branch 'inspector-display' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  3ee9b0c... Make a test with a custom display (*)
  abde37a... inspector: Cleanup (*)
  baacd9e... inspector: Init yourself (*)
  5ef4a64... window: Remove inspector updating fully (*)
  39a1d27... window: Inspector cleanups (*)
  a207a4b... inspector: Attach inspector window to display (*)
  917181c... window: Get rid of the inspector_window static (*)
  1437b08... inspector: Make object tree respect inspected display (*)
  174d8b7... inspector: Make css editor respect inspected display (*)
  bd1f7e0... inspector: Make visual settings respect the inspected displ (*)
  4eeed47... inspector: Make general respect inspected display (*)
  cecf4f2... inspector: Make inspect button use inspected display (*)
  f0f57d1... inspector: Make logs respect inspected display (*)
  c89c652... inspector: Make the css tree respect inspected display (*)
  7b14c65... Merge branch 'inspector-display' into 'master'

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