flatpak: Add gtksourceview4 to manifest
Adding gtksourceview as dependency.
gtksourceview is removed gnome runtime 45 onwards.
Copied the fix at gnome-boxes!578 (closed)
fixes #556 (closed)
Adding gtksourceview as dependency.
gtksourceview is removed gnome runtime 45 onwards.
Copied the fix at gnome-boxes!578 (closed)
fixes #556 (closed)