dwm-plugins: fix vibration test, AT debug channel, and Close softkey leak

overlay/rootfs/usr/share/dbus-1/system-services/org.freedesktop.ModemManager1.service

@@ -0,0 +1,5 @@
+[D-BUS Service]
+Name=org.freedesktop.ModemManager1
+Exec=/usr/sbin/ModemManager --debug
+User=root
+SystemdService=dbus-org.freedesktop.ModemManager1.service

overlay/rootfs/usr/share/sxmo/default_hooks/sxmo_hook_ring.sh

@@ -11,11 +11,27 @@
 # shellcheck source=scripts/core/sxmo_common.sh
 . sxmo_common.sh
 
+if [ -z "${SXMO_VIBRATE_DEV:-}" ] && [ ! -e /dev/input/by-path/platform-vibrator-event ]; then
+  for vdev in /dev/input/by-path/*vibrator*-event; do
+    if [ -e "$vdev" ]; then
+      export SXMO_VIBRATE_DEV="$vdev"
+      break
+    fi
+  done
+fi
+
 if [ -f "$XDG_CONFIG_HOME/sxmo/ringsettings" ]; then
   # shellcheck disable=SC1091
   . "$XDG_CONFIG_HOME/sxmo/ringsettings"
 fi
 
+# pm8xxx-vib shifts FF_RUMBLE strong_magnitude right by 8 bits (valid 256..65535)
+case "${SXMO_VIBRATE_STRENGTH:-}" in
+  1) SXMO_VIBRATE_STRENGTH=20000 ;;
+  2|"") SXMO_VIBRATE_STRENGTH=40000 ;;
+  3) SXMO_VIBRATE_STRENGTH=65535 ;;
+esac
+
 if [ -f "$XDG_CONFIG_HOME/sxmo/ringtone" ]; then
   custom_ring="$(head -n 1 "$XDG_CONFIG_HOME/sxmo/ringtone" 2>/dev/null)"
   if [ -n "$custom_ring" ] && [ -f "$custom_ring" ]; then