[gtk] (17 commits) Non-fast-forward update to branch stringlist

[Matthias Clasen <matthiasc src gnome org>]

The branch 'stringlist' 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:

  d11b166... Add GtkStringList as public api
  b11997a... dropdown: Use GtkStringList
  a26c837... fixup! Add GtkStringList as public api
  1515fda... fixup! dropdown: Use GtkStringList
  1cfc35d... fixup! Add GtkStringList as public api
  08a9a9c... fixup! Add GtkStringList as public api
  f85e298... fixup! dropdown: Use GtkStringList
  d55a13c... dropdown: Avoid need for an expression
  4ec3965... dropdown: Drop the buildable implementation

Commits added to the branch:

  2df139c... gdk: Make gdk_keyval_to_unicode platform-independent (*)
  05736af... x11: be more verbose when glClientWaitSync behaves unexpect (*)
  fb14802... Merge branch 'wip/dont-assert-without-evidence' into 'maste (*)
  418bbb2... entrycompletion: Name the controllers (*)
  9faaa5e... Fix change notification for event controllers (*)
  692cc42... Add gtk_widget_prepend_controller (*)
  53a30ea... entry completion: Make keynav work again (*)
  c6fe881... gdk: Clarify the docs of gdk_keyval_to_unicode (*)
  1791c63... Merge branch 'fix-entry-completion' into 'master' (*)
  367d24b... Merge branch 'keyval-to-uni-fix' into 'master' (*)
  67a7ad0... entrycompletion: Drop action support (*)
  9bcf401... Add a basic clipboard test (*)
  a0f6ff1... x11: ensure some context is bound before calling glClientWa (*)
  91a96d2... Merge branch 'matthiasc/for-master' into 'master' (*)
  7ff427b... Merge branch 'drop-entry-completion-actions' into 'master' (*)
  1643e81... Merge branch 'wip/fencing-without-context-is-discouraged' i (*)
  28357a6... Add GtkStringList as public api

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