[gedit] (19 commits) Non-fast-forward update to branch wip/panels-as-stacks

[Steve Frécinaux <sfre src gnome org>]

The branch 'wip/panels-as-stacks' 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:

  abbcbd3... Reimplement GeditPanel in terms of GtkStack instead of GtkN
  d67a03e... Implement a new GeditMenuStackSwitcher widget.
  733d24f... MenuStackSwitcher: do not drop the menu, empty it instead.
  5712ac0... MenuStackSwitcher: handle stack child property changes.
  9647130... Replace GeditPanel with GtkStacks.
  fc6f078... MenuStackSwitcher: do not show hidden children in the menu.
  00defb2... Remove icons from side panels.

Commits added to the branch:

  aeaa0df... style: remove bottom border of side panel handler (*)
  5a6eaa7... filebrowser: correctly unref schema (*)
  33cf9dc... filebrowser: Fix the size of the buttons in the toolbar (*)
  7411de5... Updated Czech translation (*)
  349201e... Add external tools plugin script: Send to fpaste (*)
  1de1558... Update Chinese simplified translation (*)
  6dc8c3e... Updated Thai translation (*)
  9126985... Updated POTFILES.in (*)
  a647abc... Fix build (*)
  f565910... Updated Czech translation (*)
  5f413fe... Updated Brazilian Portuguese translation (*)
  cd33434... External tools: Send to fpaste: set lang when None (*)
  200175f... Reimplement GeditPanel in terms of GtkStack instead of GtkN
  f006f42... Implement a new GeditMenuStackSwitcher widget.
  095830a... MenuStackSwitcher: do not drop the menu, empty it instead.
  e63c3c7... MenuStackSwitcher: handle stack child property changes.
  7a46766... Replace GeditPanel with GtkStacks.
  8fb3882... MenuStackSwitcher: do not show hidden children in the menu.
  2957228... Remove icons from side panels.

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