settings-editor: Add proper support for GPtrArray

Submitted by Stefan Berzl

Assigned to Jérôme Guelfucci

Link to original bug (#13797)

Description

Created attachment 7282 Patch for the renderer

Using only the newest builds, a command like

xfconf-query -c test -p /test2 -n -t int -t int -s 4 -s 30

adds a GPtrArray to the registry. That's also what the tooltip says when hovering over the type field in xfce4-settings-editor. The value displayed however is "<unkown>". Looking at the code, that's reasonable, because GPtrArray isn't handled at all, only

dbus_g_type_get_collection ("GPtrArray", G_TYPE_VALUE);

meaning a custom type thats a GPtrArray with G_TYPE_VALUE in it, which doesn't seem to be used anymore. The attached patches make handling both formats possible.

Patch 7282, "Patch for the renderer":
xfce-settings-cell-renderer.c.patch