Gogreen: Click on "Pages button doesn't work after clicking on /rss page

Steps to reproduce:

1. Start gogreen project.
2. Enter into English channel in edit mode.
3. Open side-Nav and click on "/rss" page under sitemap.
4. Now click on Pages button in the toolbar.Notice click doesn't work and below error is logged

   hippo-cm-9b8a357e9c.min.js:8 TypeError: Cannot read property 'trim' of undefined
       at r (hippo-cm-9b8a357e9c.min.js:23)
       at e.babelHelpers.createClass.value (hippo-cm-9b8a357e9c.min.js:23)
       at e.babelHelpers.createClass.value (hippo-cm-9b8a357e9c.min.js:23)
       at e.babelHelpers.createClass.value (hippo-cm-9b8a357e9c.min.js:23)
       at e.babelHelpers.createClass.value (hippo-cm-9b8a357e9c.min.js:23)
       at e.babelHelpers.createClass.value (hippo-cm-9b8a357e9c.min.js:26)
       at hippo-cm-9b8a357e9c.min.js:26
       at c (hippo-cm-9b8a357e9c.min.js:8)
       at hippo-cm-9b8a357e9c.min.js:8
       at h.$eval (hippo-cm-9b8a357e9c.min.js:8)(anonymous function) @ hippo-cm-9b8a357e9c.min.js:8(anonymous function) @ hippo-cm-9b8a357e9c.min.js:8c @ hippo-cm-9b8a357e9c.min.js:8(anonymous function) @ hippo-cm-9b8a357e9c.min.js:8h.$eval @ hippo-cm-9b8a357e9c.min.js:8h.$digest @ hippo-cm-9b8a357e9c.min.js:8h.$apply @ hippo-cm-9b8a357e9c.min.js:8o @ hippo-cm-9b8a357e9c.min.js:8v @ hippo-cm-9b8a357e9c.min.js:8E.onload @ hippo-cm-9b8a357e9c.min.js:8
   2hippo-cm-9b8a357e9c.min.js:8 TypeError: Cannot read property 'indexOf' of undefined
       at e.babelHelpers.createClass.value (hippo-cm-9b8a357e9c.min.js:26)
       at Object.fn [as get] (eval at <anonymous> (hippo-cm-9b8a357e9c.min.js:10), <anonymous>:4:264)
       at h.$digest (hippo-cm-9b8a357e9c.min.js:8)
       at h.$apply (hippo-cm-9b8a357e9c.min.js:8)
       at o (hippo-cm-9b8a357e9c.min.js:8)
       at v (hippo-cm-9b8a357e9c.min.js:8)
       at XMLHttpRequest.E.onload (hippo-cm-9b8a357e9c.min.js:8)