fix(composer): Properly setup editing action listeners on update

- This prevented emoji selection via the popover from working on a new
window because the plugin is loaded after the contenteditable sets up
the action listeners, so we need to re set them on update

internal_packages/composer/lib/composer-editor.jsx

@@ -1,5 +1,5 @@
 import React, {Component, PropTypes} from 'react';
-import {ContenteditableExtension, ExtensionRegistry, DOMUtils} from 'nylas-exports';
+import {ExtensionRegistry, DOMUtils} from 'nylas-exports';
 import {DropZone, ScrollRegion, Contenteditable} from 'nylas-component-kit';
 
 /**
@@ -297,7 +297,6 @@ class ComposerEditor extends Component {
       </DropZone>
     );
   }
-
 }
 ComposerEditor.containerRequired = false
 

src/components/contenteditable/contenteditable.cjsx

@@ -158,6 +158,7 @@ class Contenteditable extends React.Component
       @_restoreSelection()
       @_notifyOfSelectionRestoration()
     @_refreshServices()
+    @_setupEditingActionListeners()
     @_mutationObserver.disconnect()
     @_mutationObserver.observe(@_editableNode(), @_mutationConfig())
     @setInnerState editableNode: @_editableNode()