Open folder as OK action when a folder is selected in save-as dialog.

ui/file_manager/file_manager/foreground/js/ui/dialog_footer.js

Index: ui/file_manager/file_manager/foreground/js/ui/dialog_footer.js
diff --git a/ui/file_manager/file_manager/foreground/js/ui/dialog_footer.js b/ui/file_manager/file_manager/foreground/js/ui/dialog_footer.js
index 583e5468d634099a763e4d0c27516ab0838bc304..36a95dc5866d9c8e34ef0f8fbdb3a23ad512639e 100644
--- a/ui/file_manager/file_manager/foreground/js/ui/dialog_footer.js
+++ b/ui/file_manager/file_manager/foreground/js/ui/dialog_footer.js
@@ -57,6 +57,9 @@ function DialogFooter(dialogType, container, filenameInput) {
 
   // Initialize the element styles.
   container.classList.add('button-panel');
+
+  // Set initial label for OK button. The label can be updated dynamically
+  // depending on dialog types.
   this.okButton.textContent = DialogFooter.getOKButtonLabel_(dialogType);
 
   // Register event handlers.