Merge pull request #326 from fras2560/master

fix(issue-324): Re-hydrate the controlled component

Author: fongandrew

.ts/index.js

@@ -611,6 +611,7 @@ export class Controlled extends React.Component<IControlledCodeMirror, any> {
     if (this.props.editorWillUnmount) {
       this.props.editorWillUnmount(cm);
     }
+    this.hydrated = false;
   }
 
   /** @internal */