display leaf icon for menu items and projects when DTL is enable

close #103

src/components/Menu.vue

@@ -71,6 +71,7 @@
                   : project.uri
               "
               :class="hasUnreadNotification(project) ? 'new' : undefined"
+              :data-dtl="project.isDTLEnabled ? 'true' : undefined"
               @click="collapse()"
               >{{ project.title }}</router-link
             >
@@ -344,6 +345,10 @@ button[aria-controls="menu"][aria-expanded="false"]
   margin-left: auto;
 }
 
+#menu a {
+  display: flex;
+  align-items: center;
+}
 #menu li a::before {
   content: "";
   position: absolute;