debian: Switch to using org.mate.NotificationDaemon by default to eliminate popups not closing

- uses 'slider' theme

debian/control

@@ -45,9 +45,9 @@ Recommends:
     gnome-themes-standard,
     haveged,
     libnotify-bin,
+    mate-notification-daemon,
     network-manager (>= 0.8.1-1),
     network-manager-gnome,
-    notify-osd,
     ntpdate,
     python-nautilus,
     python-xdg,

debian/qubes-core-agent.gsettings-override

@@ -0,0 +1,2 @@
+[org.mate.NotificationDaemon]
+theme='slider'

misc/qubes-trigger-desktop-file-install

@@ -62,6 +62,7 @@ FILES=(
     'gnome-sound-applet'
     'gnome-screensaver'
     'orca-autostart'
+    'notify-osd'
 ); install --remove-show-in --add-not-show-in X-QUBES
 
 # Desktop Entry Modification - NotShowIn=DisposableVM
@@ -91,7 +92,3 @@ FILES=('nm-applet')
 FILES=(
     'abrt-applet'
 ); install --remove-show-in
-
-# Desktop Entry Modification - Misc
-# notify-osd
-$INSTALL_CMD --remove-show-in --remove-key X-GNOME-Autostart-enabled "$(generatePath notify-osd)"