disable display when electrical /systems/electrical/output/dme is false

Aircraft/Instruments-3d/ki266/ki266.xml

@@ -31,6 +31,7 @@
     <dimming>instrumentation/dme[0]/dimming-norm</dimming>
 
     <min-kts>instrumentation/dme[0]/switch-min-kts</min-kts>
+    <electrical>systems/electrical/outputs/dme</electrical>
   </params>
 
   <path>ki266.ac</path>
@@ -43,6 +44,7 @@
       <and>
         <property alias="../../../../params/serviceable"/>
         <property alias="../../../../params/power-btn"/>
+        <property alias="../../../../params/electrical"/>
       </and>
     </condition>
   </animation>