[gtk] (9 commits) Non-fast-forward update to branch matthiasc/for-master

[Matthias Clasen <matthiasc src gnome org>]

The branch 'matthiasc/for-master' 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:

  e2dafcd... Revert "reftest: get backtraces"
  51ab3e3... ci: Use catchsegv catching stacktraces

Commits added to the branch:

  e4215ec... bookmarksmanager: Cancel async reads properly (*)
  564ae4b... Merge branch 'matthiasc/for-master' into 'master' (*)
  78134fc... Add a function to request motion events (*)
  1a39ac6... Update Catalan translation (*)
  5b5d266... idle sizer: Request a motion event after layout (*)
  5533494... Merge branch 'synthetic-motion' into 'master' (*)
  f6adba5... NEWS: Updates (*)
  71f2bb1... wip: Add another layout manager demo (*)
  0b9c461... css: Fix parsing of scientific notation

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