[gtk] (14 commits) Non-fast-forward update to branch layout-manager-transform-demo

[Matthias Clasen <matthiasc src gnome org>]

The branch 'layout-manager-transform-demo' 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:

  2955ed2... textview: Fix placement of Emoji chooser
  6c0ca54... NEWS: Updates
  8147030... gl: Use linear interpolation for offscreen buffers
  9b5dc9c... text widgets: Don't lose focus after Emoji
  4cbf3ff... gsk: Handle 3d transform the test differently
  78efdb8... Fix picking
  59528ee... Add a simple testcase for transforms
  8716e08... Cosmetic improvement to the layout manager demo
  79c3a5e... Add another layout manager demo

Commits added to the branch:

  ae5d1cd... Annotate sequence argument of GtkGesture signals as nullabl (*)
  21b9dad... Merge branch 'gesture-nullable-sequence' into 'master' (*)
  a909f9d... Update German translation (*)
  6c9fe63... Update Turkish translation (*)
  70c5dee... NEWS: Updates (*)
  9512e46... textview: Fix placement of Emoji chooser (*)
  d5121af... text widgets: Don't lose focus after Emoji (*)
  30ab8b3... Fix picking (*)
  eee6d28... Merge branch 'matthiasc/for-master' into 'master' (*)
  ca8a0bd... gl: Use GL_LINEAR for some offscreen rendering
  19d6206... Update gsk tests
  a46e7e9... Add a simple testcase for transforms
  bc4a30a... Cosmetic improvement to the layout manager demo
  4007413... Add another layout manager demo

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