center icon and legend over map

src/components/FindexGlobalThreatsViz.vue

@@ -178,6 +178,7 @@ $fishing-pressure: #835192;
     display: flex;
     flex-direction: row;
     align-items: center;
+    justify-content: center;
 }
 .tab-icon-image {
     max-width: 50px;