[gnome-builder] (9 commits) Non-fast-forward update to branch wip/chergert/326redesign

[Christian Hergert <chergert src gnome org>]

The branch 'wip/chergert/326redesign' 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:

  e05b5ad... import recent panel-gtk updates
  90d3d72... pnl: ensure group is always initialized via goto
  7fca78d... pnl: allow NULL parameters for boolean child properties

Commits added to the branch:

  5199591... flatpak: perform remove_range() inside of NULL-check (*)
  e23c8d1... Update Kazakh translation (*)
  19d6d02... Update Spanish translation (*)
  3332cb3... update gitignore (*)
  c4bc12a... import recent panel-gtk updates
  b9e2cf6... pnl: ensure group is always initialized via goto
  a1c4460... pnl: allow NULL parameters for boolean child properties
  c2cd8e6... layout: don't override the css name for the panel
  d4e7389... layout: drop use of custom css element name

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