Don't detach value from defaultValue for submit/reset inputs (#7197)

src/renderers/dom/client/wrappers/ReactDOMInput.js

@@ -216,10 +216,20 @@ var ReactDOMInput = {
  },
 
  postMountWrapper: function(inst) {
+ var props = inst._currentElement.props;
+
  // This is in postMount because we need access to the DOM node, which is not
  // available until after the component has mounted.
  var node = ReactDOMComponentTree.getNodeFromInstance(inst);
- node.value = node.value; // Detach value from defaultValue
+
+ // Detach value from defaultValue. We won't do anything if we're working on
+ // submit or reset inputs as those values & defaultValues are linked. They
+ // are not resetable nodes so this operation doesn't matter and actually
+ // removes browser-default values (eg "Submit Query") when no value is
+ // provided.
+ if (props.type !== 'submit' && props.type !== 'reset') {
+ node.value = node.value;
+ }
 
  // Normally, we'd just do `node.checked = node.checked` upon initial mount, less this bug
  // this is needed to work around a chrome bug where setting defaultChecked