Summary:
Fixes T3796. When this got split out into tabs, the data endpoints were accidentally locked down. Open them up again if the setting is on.
Also, when you open/close the console we try to save the preference. Just no-op if you're logged out. Previously, you'd see the requests in DarkConsole since they failed.
Test Plan: Enabled `darkconsole.always-on` and toggled the console on and off as a logged-out user. Disabled the preference and verified it was no longer accessible.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T3796
Differential Revision: https://secure.phabricator.com/D6886