fix loader bug

src/views/Trackers.vue

@@ -16,9 +16,7 @@
                                     <div class="row">
                                         <div v-if="tracker.tracking === true">
                                             <div class="text-danger font-weight-bolder float-end tracker-time-info">
-                                                <div class="spinner-grow spinner-grow-sm" role="status">
-                                                    <span class="sr-only">Tracking...</span>
-                                                </div>
+                                                <div class="spinner-grow spinner-grow-sm" role="status"></div>
                                                 Tracking (<i class="fas fa-play"></i> {{ getTrackingStartTime(tracker) }})
                                             </div>
                                         </div>
@@ -378,4 +376,4 @@ export default {
     color: lightgray;
 }
 
-</style>
+</style>