[gnome-41] Enable webkit sandbox on GApplication.startup
This needs to be done only once, so this is a good place for it.
In commit 3fcb670f we enabled it using Gjs "static" syntax, which is not available in Gjs versions older than 1.71.1. https://gitlab.gnome.org/GNOME/gjs/-/blob/70552bee79f644836a5e9f9a54845791b1ef7a94/NEWS#L67
Let's enable it on GApplication.startup for GNOME 41.
Fixes #81 (closed)
Edited by Felipe Borges