Merge pull request #8483 from open-sausages/pulls/4/666-fix-enter-form-submission

BUG: Fix `ENTER` not triggering form save button as `GridField`s used `submit` type buttons

src/Forms/GridField/GridField_FormAction.php

@@ -101,6 +101,7 @@ class GridField_FormAction extends FormAction
                 // will strip it from the requests
                 'name' => 'action_gridFieldAlterAction' . '?' . http_build_query($actionData),
                 'data-url' => $this->gridField->Link(),
+                'type' => "button",
             )
         );
     }