gtk+ 3.22.17 release fixing a number of issues:

• 766517 GtkAboutDialog should use https:// license URLs
• 778188 Throttle system bell requests on Wayland
• 781583 gtk_image_new_from_resource does not work
• 781935 Add nullable return annotation to gtk_notebook_get_tab_label
• 781936 Add nullable return annotation to gtk_text_mark_get_name
• 782040 Wacom pen calibration application responds to mouse input
• 782325 wayland: Add possibility to get the exported handle multiple times
• 784323 Quartz backend: gtk_clipboard_get_default not implemented
• 784723 macOS: native file chooser dialog
• 784888 gtkapplication: Mark gtk_application_get_active_window() as nullable