Workspace Menu

Summary:
* adds workspace partial

* wires up accordion

Test Plan:
* load app
* test workspace menu
* test accordion

Reviewers: shadowhand, rjmackay

Reviewed By: rjmackay

Subscribers: sebm90, digitalafrican, eyedol, lkamau, srutto, dkobia

Differential Revision: https://phabricator.ushahidi.com/D320