_controls.scss in blacklight-7.19.1

- old
+ new

@@ -32,10 +32,11 @@
 
 .view-type {
   display: inline-block;
 
   .caption {
-    @extend .sr-only;
+    @extend .sr-only !optional;
+    @extend .visually-hidden !optional;
   }
 }
 
 .search-input-group {
   width: 80%;