Rework D-Bus policy of nheko

 - Allow org.freedesktop.secrets, fixes #4584
 - Improve comments about notifications and systray

etc/profile-m-z/nheko.profile

@@ -51,11 +51,10 @@ private-dev
 private-etc alsa,alternatives,asound.conf,ca-certificates,crypto-policies,fonts,gtk-2.0,gtk-3.0,host.conf,hostname,hosts,ld.so.cache,ld.so.conf,ld.so.conf.d,ld.so.preload,locale,locale.alias,locale.conf,mime.types,nsswitch.conf,pki,pulse,resolv.conf,selinux,ssl,X11,xdg
 private-tmp
 
-
-# Add the next lines to your nheko.local to enable notification support.
-#ignore dbus-user none
-#dbus-user filter
+dbus-user filter
+dbus-user.talk org.freedesktop.secrets
+# Add the next line to your nheko.local to enable notification support.
 #dbus-user.talk org.freedesktop.Notifications
+# Add the next line to your nheko.local to enable tray icon support.
 #dbus-user.talk org.kde.StatusNotifierWatcher
-dbus-user none
 dbus-system none