[gnome-panel] (9 commits) ...layout: redo default layout loading

[Alberts Muktupāvels <muktupavels src gnome org>]

Summary of changes:

  b9dd3d9... bump version to 3.35.0 (*)
  e02b07e... libgnome-panel: turn into public library (*)
  e5cc6e8... layout: make panel_layout_append_from_file static (*)
  af577b1... layout: remove wrong break in for loop (*)
  479639b... layout: fix -Wshadow warning (*)
  41b95b3... layout: use layouts dir for layout files (*)
  4c3250a... layout: rename panel-default-layout.layout to default.layou (*)
  a52dbc8... data: update default layout (*)
  b341b4f... layout: redo default layout loading (*)

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