fixed error where editing voltage set voltage equal to expected usage

Frontend/power-tracker/src/pages/ManageSensors.tsx

@@ -148,15 +148,15 @@ function ManageSensors() {
         }
         var euse;
         if(values.euse == undefined || values.euse == null){
-            euse=1
+            euse=0
         }else{
             euse=values.euse
         }
         var volt;
-        if(values.euse == undefined || values.euse == null){
+        if(values.voltage == undefined || values.voltage == null){
             volt=1
         }else{
-            volt=values.euse
+            volt=values.voltage
         }
         axios.put(
             IngressAPI + '/new-hotdrop',