[gimp] (32 commits) Non-fast-forward update to branch wip/passthrough

[N/A <ell src gnome org>]

The branch 'wip/passthrough' 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:

  032f911... app: add parser/evaluator for the GUM language
  af4eec1... app: add ui_meta keys for controlling some ui properties dy
  328d9c4... ^^^ wip/passthrough ^^^
  3d1dcaf... app: add pass-through layer mode
  9bdd974... app: add GimpDrawable::get_source_node() vfunc
  6f301f4... app: connect layer backdrop to source node's input
  d400252... app: implement pass-through mode in GimpGroupLayer
  a93f130... app: add gimp_projectable_{begin,end}_render()
  a2b4c63... app: add GimpTileHandlerProjectable
  ee0d252... app: use {begin,end}_render() and GimpTileHandlerProjectabl
  5756e08... app: implement {begin,end}_render() for GimpGroupLayer
  a98a52b... app: move bottom-layer special casing to GimpOperationLayer
  0c36932... app: adapt gimp_image_merge_layers() to handle pass-through

Commits added to the branch:

  ecb346a... libgimpwidgets: gimp_prop_boolean_combo_box_new(): use a Gi (*)
  c940b5d... Bug 779620 - "Advanced Color Options" in filter dialogs is  (*)
  4455cd9... Bug 779620 - "Advanced Color Options" in filter dialogs is  (*)
  c2b7983... app: remove unused old render structs from gimpdrawable-ble (*)
  80ec868... Update Greek translation (*)
  536cc85... app: keep the src image's resolution and unit in copied/cut (*)
  4f5bd08... app: remove unused includes from gimpdisplayshell-dnd.c (*)
  722a1a1... app: add gimp_edit_paste_as_new_image() and use it from GUI (*)
  3c7a548... app: call the active vectors handler at the end of gimp_dis (*)
  bc45899... app: in prop gui & co., allow picking outside drawable boun (*)
  bfadac1... app: add GimpColorTool::can_pick() virtual function (*)
  bd5ec46... app: improve GimpFilterTool::can_pick() (*)
  6265282... build: update flatpak-howto.txt to build both 32 and 64-bit (*)
  6126437... configure: shared-mime-info is necessary to detect SVG icon (*)
  e83b136... configure: remind to run gdk-pixbuf-query-loaders.exe on Wi (*)
  129a0e4... app: "Reset to default values" does not properly reset aspe (*)
  ab56f52... app: "Reset to default values" does not properly reset gene (*)
  628be2a... app: fix typo s/Devics/Devices/. (*)
  0ccb5e6... app: don't prepare input color transform for source filters (*)
  9be6b74... app: add parser/evaluator for the GUM language
  68416a4... app: add ui_meta keys for controlling some ui properties dy
  485ff53... ^^^ wip/passthrough ^^^
  ce5bb25... app: add pass-through layer mode
  5b7f84c... app: add GimpDrawable::get_source_node() vfunc
  1232e97... app: connect layer backdrop to source node's input
  cb1d8c2... app: implement pass-through mode in GimpGroupLayer
  ef719eb... app: add gimp_projectable_{begin,end}_render()
  782b158... app: add GimpTileHandlerProjectable
  cd208c4... app: use {begin,end}_render() and GimpTileHandlerProjectabl
  c18d8fb... app: implement {begin,end}_render() for GimpGroupLayer
  bf628c2... app: move bottom-layer special casing to GimpOperationLayer
  8f1f4a0... app: adapt gimp_image_merge_layers() to handle pass-through

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