[gtk] (24 commits) ...Merge branch 'wip/carlosg/controller' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  e01e9ce... eventcontroller: Add vfuncs to (un)set widget (*)
  8ddba5f... eventcontroller: Move declaration (*)
  9af03fa... widget: Expose gtk_widget_add_controller() (*)
  9c0acf6... widget: Allow adding event controllers in ui files (*)
  40a082d... aboutdialog: Put event controllers into ui file (*)
  0d7cf79... emojichooser: Put event controllers into ui file (*)
  c2ec738... widget-factory: Put gesture into ui file (*)
  fa97236... placesviewrow: Put event controllers into ui file (*)
  31de977... filechooser: Put event controllers into ui file (*)
  6fb92a0... legacycontroller: Port to new API model (*)
  703d534... rotategesture: Port to new API model (*)
  91efa37... zoomgesture: Port to new API model (*)
  66223aa... swipegesture: Port to new API model (*)
  7199127... pangesture: Port to new API model (*)
  4ddc94b... multipressgesture: Port to new API model (*)
  bf82149... longpressgesture: Port to new API model (*)
  1e6eb1f... draggesture: Port to new API model (*)
  74dbb05... eventcontrollerscroll: Port to new API model (*)
  4f3058f... eventcontrollermotion: Port to new API model (*)
  c5f12a7... padcontroller: Port to new API model (*)
  ba78499... eventcontroller: Make widget no longer a construct-only pro (*)
  15e0075... eventcontrollerkey: Port to new API model (*)
  3675f9c... gesturestylus: Port to new API model (*)
  1dcb76b... Merge branch 'wip/carlosg/controller' into 'master'

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