gplugin/gplugin

Make property registration consistent

2021-10-09, Elliott Sales de Andrade
cbac138e5c89
Make property registration consistent

Always order it permissions, construct-only (if applicable), static strings.
And add static strings everywhere, since they are.

Testing Done:
Compile only.

Reviewed at https://reviews.imfreedom.org/r/1010/
// SPDX-FileCopyrightText: 2021 GNOME Foundation
// SPDX-License-Identifier: LGPL-2.1-or-later
// A map between namespaces and base URLs for their online documentation
baseURLs = [
[ 'GLib', 'https://docs.gtk.org/glib/' ],
[ 'GObject', 'https://docs.gtk.org/gobject/' ],
[ 'GModule', 'https://docs.gtk.org/gmodule/' ],
]