[gtk+] (37 commits) Non-fast-forward update to branch wip/dboles/combobox-cleanup

[Daniel Boles <dboles src gnome org>]

The branch 'wip/dboles/combobox-cleanup' 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:

  208d837... combobox: Drop a workaround from the list mode age
  6138076... combobox: Stop incessantly NULL-checking the menu
  65d0035... combobox: Factor repeated code out to function
  5c9d4d5... combobox: Remove popup_for_device()

Commits added to the branch:

  fee788c... widget: Be visible by default (*)
  33d41fc... Hide popovers and toplevels by default (*)
  b1eccd7... coloreditor: Hide overlay boxes (*)
  8b3f5ce... widget-factory: Adapt to GtkWidget visibility changes (*)
  02c2887... filechooser: adapt to GtkWidget:visible changes (*)
  020d366... widget-factory: Remove some gtk3-widget-factory leftovers (*)
  8085884... gtkshortcutswindow: Adapt to GtkWidget visibility changes (*)
  524bf22... shortcutsshortcut: Be a GtkWidget (*)
  5dbf845... shortcutswindow: Use GtkButton:icon-name for search button (*)
  2a84be4... shortcutswindow: Unset search_bar in dispose (*)
  9679c4f... gtkbuilder: Improve error messages (*)
  d862c5c... sizerequest: Use gtk_widget_measure to measure widget sizes (*)
  5f57e3b... filechooserbutton: Be a GtkWidget (*)
  13b001b... widget: Remove show_all vfunc (*)
  ea897c6... Remove gtk_widget_show_all (*)
  f4341ee... widget: Remove show-all property (*)
  3ec15d9... Fix some widget visibility fallout (*)
  c36ad40... recorder: Adapt to widget visibility changes (*)
  3fb4b07... button: Don't explicitly show child widgets (*)
  4bd2a9b... popovermenu: Remove forall implementation (*)
  0f2e043... toolitemgroup: Properly remove internal child widget (*)
  6376aaf... assistant: Don't forget to remove child widgets (*)
  b1408c9... fontbutton: Be a GtkWidget (*)
  ab051fd... Don't hide windows and popovers in init() (*)
  802f838... combobox: If typechecking, don’t reference before (*)
  aca0422... Update POTFILES.in and POTFILES.skip (*)
  71d7a1b... menushell: Don’t dereference before typechecking (*)
  e47bd31... Fix CSS spelling in a translatable string (*)
  06269bf... Update Polish translation (*)
  a5211ad... menushell: Make select_first() do that, not last… (*)
  c662e69... combobox: Fix documentation typo bx => box (*)
  c5c0127... menushell: Fix select_last() to get last, not 1st (*)
  c7e4c82... combobox: some code cleanups
  36413a8... combobox: Reuse code rather than reimplementing it
  cfae7cb... combobox: Remove property cell-area
  e1c92b0... combobox: Move area and menu to .ui file
  89c825e... combobox: Stop pointlessly NULL-checking the menu

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