Bulk export (#684)

* First pass (working) collection export to zip

* Add export confirmation screen

* 👕

* Refactor

* Job for team export, move to tmp file, settings UI

* Export all collections job

* 👕

* Add specs

* Clarify UI

app/components/Sidebar/Settings.js

@@ -2,6 +2,7 @@
 import * as React from 'react';
 import { observer, inject } from 'mobx-react';
 import {
+  DocumentIcon,
   ProfileIcon,
   SettingsIcon,
   CodeIcon,
@@ -74,6 +75,11 @@ class SettingsSidebar extends React.Component<Props> {
                   Integrations
                 </SidebarLink>
               )}
+              {user.isAdmin && (
+                <SidebarLink to="/settings/export" icon={<DocumentIcon />}>
+                  Export Data
+                </SidebarLink>
+              )}
             </Section>
           </Scrollable>
         </Flex>