[gnome-shell] (4 commits) Non-fast-forward update to branch wip/carlosg/destroy-old-osk-layouts

[Carlos Garnacho <carlosg src gnome org>]

The branch 'wip/carlosg/destroy-old-osk-layouts' 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:

  ab220b0... keyboard: Destroy old layout actors when regenerating keybo

Commits added to the branch:

  fb04daf... st: Use g_signal_handler_disconnect() to disconnect from St (*)
  94995e9... st: Reload icon on style changes only if necessary (*)
  50b7739... worldClocks: Ignore locations with unknown timezone (*)
  ed999ce... keyboard: Destroy old layout actors when regenerating keybo

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