move support links to footer

Summary: move the support links to the footer and remove them from the Workspace menu

Test Plan: check out the footer and Workspace menu

Reviewers: rjmackay, vladimir, shadowhand

Reviewed By: shadowhand

Subscribers: digitalafrican, anarghya, srutto

Maniphest Tasks: T916

Differential Revision: https://phabricator.ushahidi.com/D440