[PLT-3377] Open up a shortcuts dialog instead of printing help text (#7064)

* open up a shortcuts dialog instead of printing help text

* Updating UI for keyboard shortcuts modal

* update PR per PLT-7284

* fix typo error

* fix mixed up shortcut keys

* move to client side

* fix shortcuts list, remove unused function and revert server side code for autocompletion

* remove quick team switcher

webapp/components/needs_team/needs_team.jsx

@@ -46,6 +46,7 @@ import InviteMemberModal from 'components/invite_member_modal.jsx';
 import LeaveTeamModal from 'components/leave_team_modal.jsx';
 import ResetStatusModal from 'components/reset_status_modal';
 import LeavePrivateChannelModal from 'components/modals/leave_private_channel_modal.jsx';
+import ShortcutsModal from 'components/shortcuts_modal.jsx';
 
 import iNoBounce from 'inobounce';
 import * as UserAgent from 'utils/user_agent.jsx';
@@ -233,6 +234,7 @@ export default class NeedsTeam extends React.Component {
                     <RemovedFromChannelModal/>
                     <ResetStatusModal/>
                     <LeavePrivateChannelModal/>
+                    <ShortcutsModal/>
                 </div>
             </div>
         );