717ec0f8a4
As of now, the only way to add an app icon to a folder is by dragging it to the folder icon itself. Even though we allow opening the folder popup when hovering the icon, dropping an app icon there wouldn't work. Make the folder view add the app icon to it's GSettings key (which will trigger _redisplay() and will show the new icon) when dropping to a specific position. https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/603