Recommend this portal backend for all GTK3 and GTK4 users

... by using 'Supplements: gtk3 gtk4'.  See:
https://pagure.io/fedora-workstation/issue/298

Resolves: #2078624

xdg-desktop-portal-gtk.spec

@@ -3,7 +3,7 @@
 
 Name:           xdg-desktop-portal-gtk
 Version:        1.12.0
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        Backend implementation for xdg-desktop-portal using GTK+
 
 License:        LGPLv2+
@@ -22,10 +22,12 @@ BuildRequires:  systemd-rpm-macros
 Requires:       dbus
 Requires:       gsettings-desktop-schemas
 Requires:       xdg-desktop-portal >= %{xdg_desktop_portal_version}
-%if 0%{?fedora}
-# Use rich deps to pull in this package when gtk3 and flatpak (or snapd) are both installed
-Supplements:    (gtk3 and (flatpak or snapd))
-%endif
+
+# This portal is recommended if you have installed any app that uses GTK. (It's
+# also recommended if you have any such app installed via flatpak or snap, but
+# that is impossible to detect here.)
+Supplements:    gtk3
+Supplements:    gtk4
 
 %description
 A backend implementation for xdg-desktop-portal that is using GTK+ and various
@@ -77,6 +79,10 @@ org.gnome.SessionManager D-Bus interfaces.
 
 
 %changelog
+* Tue Feb 08 2022 Debarshi Ray <rishi@fedoraproject.org> - 1.12.0-1
+- Recommend this portal backend for all GTK3 and GTK4 users
+Resolves: #2078624
+
 * Tue Feb 08 2022 Debarshi Ray <rishi@fedoraproject.org> - 1.12.0-1
 - Rebase to 1.12.0
 Resolves: #2051493