ngBootstrap UX fix

frontend/src/styles.scss

@@ -1072,4 +1072,8 @@ th {
 
 #divider {
   background-image: url("data:image/svg+xml,%3csvg width='100%25' height='100%25' xmlns='http://www.w3.org/2000/svg'%3e%3crect width='104%25' height='100%25' fill='none' stroke='white' stroke-width='4' stroke-dasharray='10%2c17' stroke-dashoffset='18' stroke-linecap='square'/%3e%3c/svg%3e");
-}
+}
+
+.visually-hidden {
+  display: none;
+}