Ticket #51863: 51863.diff

src/wp-includes/css/jquery-ui-dialog.css

@@ -291 +291 @@
         height: 36px;
         text-align: center;
         border-radius: 0;
+        overflow: hidden;
 }
 
 .ui-dialog-titlebar-close:before {
@@ -319 +320 @@
         outline-offset: -2px;
 }
 
-.ui-dialog-titlebar-close .ui-button-text {
-        display: none;
-}
-
 .ui-dialog-content {
         padding: 16px;
         overflow: auto;