value attribute of Editor must be set after mounting

browser/components/CodeEditor.js

@@ -95,6 +95,7 @@ export default class CodeEditor extends React.Component {
 
   componentDidMount () {
     let { mode, value } = this.props
+    this.value = value
     let el = ReactDOM.findDOMNode(this)
     let editor = this.editor = ace.edit(el)
     editor.$blockScrolling = Infinity

browser/components/MarkdownEditor.js

@@ -13,6 +13,10 @@ class MarkdownEditor extends React.Component {
     }
   }
 
+  componentDidMount () {
+    this.value = this.refs.code.value
+  }
+
   handleChange (e) {
     this.value = this.refs.code.value
     this.props.onChange(e)