Link "More Stuff" to /applications/, not /apps/

Summary: D3575, D3576, D3577, D3578, D3579, D3580 put all the /apps/ links on /applications/, so we can get rid of /apps/ without loss of functionality.

Test Plan: Clicked "More Stuff" on the homepage, got /applications/ instead of /apps/.

Reviewers: vrana, btrahan

Reviewed By: vrana

CC: aran

Differential Revision: https://secure.phabricator.com/D3581