add functionality to show sub odometer readings.

Views/Vehicle/_OdometerRecordModal.cshtml

@@ -27,7 +27,7 @@
     </div>
     <div class="row">
         <div class="col-12 d-flex justify-content-center align-items-center">
-            <h1 class="display-1 trip-odometer"></h1>
+            <h1 class="display-1 trip-odometer" onclick="toggleSubOdometer()"></h1>
             <h1 class="display-6 trip-odometer-sub ms-2 d-none">0</h1>
         </div>
     </div>

wwwroot/js/odometerrecord.js

@@ -332,4 +332,11 @@ function saveRecordedOdometer() {
         });
     });
     hideTripModal();
+}
+function toggleSubOdometer() {
+    if ($(".trip-odometer-sub").hasClass("d-none")) {
+        $(".trip-odometer-sub").removeClass("d-none");
+    } else {
+        $(".trip-odometer-sub").addClass("d-none");
+    }
 }