fix: mobile toolbar tooltip regression (#2939)

src/css/styles.scss

@@ -227,7 +227,8 @@
   .App-top-bar {
     z-index: var(--zIndex-layerUI);
     display: flex;
-    justify-content: center;
+    flex-direction: column;
+    align-items: center;
   }
 
   .App-bottom-bar {