"Sign in to another workspace" link doesn't work

[joshuatbrown]

Steps to reproduce:

1. Sign into one team.
2. Click the Team name / down arrow in the upper left.
3. Click Sign in to another workspace...

Expected: Sock allows you to sign in to another workspace.

Actual: Sock does nothing.

[joshuatbrown]

As of dc0c18f, you can open a new tab with Command-T and sign into a new team there. However, this issue remains — the Sign in to another workspace... link is still broken.