reunify metadata icon colours (#2689)

Author: PhilBastian

src/Frontend/src/components/MetadataItem.vue

@@ -25,5 +25,6 @@ defineProps<Props>();
 
 .icon {
   margin-right: 0.25rem;
+  color: var(--reduced-emphasis);
 }
 </style>

src/Frontend/src/components/messages/MessageView.vue

@@ -93,7 +93,7 @@ watch(
   },
   { immediate: true }
 );
-const endpointColor = hexToCSSFilter("#777F7F").filter;
+const endpointColor = hexToCSSFilter("#929E9E").filter;
 
 onMounted(() => {
   const { back, ...otherArgs } = route.query;