Set more position properties to fix banner centering on android chrome

src/views/splash/beta/top-banner.scss

@@ -15,7 +15,9 @@
     .beta-top-container {
         position: absolute;
         top: 0;
+        right: 0;
         bottom: 0;
+        left: 0;
         margin: auto;
         height: 15rem;
     }