Provide GtkEmojiChooser as public API in 3.x
There had been made a request to use "Insert Emoji" also in evolution: https://bugzilla.gnome.org/show_bug.cgi?id=789267
To avoid code duplication and stay consistent, I thought I'll use the GtkEmojiChooser widget (popover), but then I realized it's a private API of gtk+, not public.
Would you mind to make it public in gtk3?