Clean up workspace panel changes, refs #255

Summary:
As [[https://github.com/ushahidi/Lamu/pull/255/files#r10780980 | robbie said]],
my implementation of serializeData didn't really make sense. But this was my
long term plan: always allow the panel to be rendered, but collect data from
multiple locations.

Test Plan:
- Login
- Click Workspace to get to panel
- See user data and faked stats

Reviewers: seth, rjmackay

Reviewed By: rjmackay

Subscribers: dkobia

Maniphest Tasks: T76

Differential Revision: https://phabricator.ushahidi.com/D2