[gtk+] (15 commits) Non-fast-forward update to branch wip/baedert/children

[Timm Bäder <baedert src gnome org>]

The branch 'wip/baedert/children' 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:

  deb3037... label: Remove angle property
  6f1e49d... snapshot: Add annotations to parameters/return values
  11086e7... test: Remove gtk_label_set_angle calls
  7af502d... label: Remove :track-visited-links
  768537c... headerbar: measure children using gtk_widget_measure
  66ac223... revealer: Measure child widget size using gtk_widget_measur
  84bd734... scrolledwindow: measure child widgets using gtk_widget_meas
  b640222... viewport: Use gtk_widget_measure to measure child sizes
  f4b7b6f... separatortoolitem: Remove button-event/motion-event handler
  b9bf1b4... linkbutton: Replace button-press-event handler with gesture
  e71ca98... toolbar: Replace button-press-event handler with gesture
  f290c08... menu: Replace button-press-handler with gesture
  2267dd1... widget: Fix :parent property type

Commits added to the branch:

  ba29569... label: Remove angle property
  92fef29... snapshot: Add annotations to parameters/return values
  c21bcf8... test: Remove gtk_label_set_angle calls
  420488e... label: Remove :track-visited-links
  538a630... headerbar: measure children using gtk_widget_measure
  c999a71... revealer: Measure child widget size using gtk_widget_measur
  3e47689... scrolledwindow: measure child widgets using gtk_widget_meas
  293289c... viewport: Use gtk_widget_measure to measure child sizes
  3ec8612... separatortoolitem: Remove button-event/motion-event handler
  ce595db... linkbutton: Replace button-press-event handler with gesture
  b3aeb45... toolbar: Replace button-press-event handler with gesture
  6f76018... menu: Replace button-press-handler with gesture
  5b7fcd6... widget: Fix :parent property type
  b26b604... frame: Use gtk_widget_measure to measure child sizes
  f38b19a... widget-factory: Use GtkButton:icon-name to construct icon b