close permission selector when you click outside

frontend/src/components/TopicCard/Permission.js

@@ -1,7 +1,7 @@
 import React, { PropTypes, Component } from 'react'
 
-// TODO how do we make it so that clicking elsewhere on the topic
-// card cancels this
+import onClickOutsideAddon from 'react-onclickoutside'
+
 class Permission extends Component {
   constructor(props) {
     super(props)
@@ -22,6 +22,10 @@ class Permission extends Component {
     this.setState({selectingPermission: false})
   }
 
+  handleClickOutside = instance => {
+    this.closePermissionSelect()
+  }
+
   liClick = value => event => {
     this.closePermissionSelect()
     this.props.updateTopic({
@@ -62,4 +66,4 @@ Permission.propTypes = {
   updateTopic: PropTypes.func
 }
 
-export default Permission
+export default onClickOutsideAddon(Permission)

package.json

@@ -45,6 +45,7 @@
     "react": "15.4.2",
     "react-dom": "15.4.2",
     "react-dropzone": "3.9.1",
+    "react-onclickoutside": "^5.9.0",
     "redux": "3.6.0",
     "riek": "^1.0.7",
     "simplewebrtc": "2.2.2",