Propagate PHABRICATOR_ENV into VCS commands explicitly

Summary: Fixes T4155. See discussion in T4155.

Test Plan: @mbishopim3 confirmed this fixes his issue.

Reviewers: btrahan, chad

Reviewed By: chad

CC: mbishopim3, aran

Maniphest Tasks: T4155

Differential Revision: https://secure.phabricator.com/D7646
Update 'Add SSH Key' page

Summary: Uses an ObjectBoxView

Test Plan: added an ssh key

Reviewers: epriestley

Reviewed By: epriestley

CC: Korvin, epriestley, aran

Maniphest Tasks: T4150

Differential Revision: https://secure.phabricator.com/D7645
Clean up external accounts page

Summary: Touched up the layout, css of this page

Test Plan: Viewed linked and linkable accounts. Tested mobile layout

Reviewers: epriestley

Reviewed By: epriestley

CC: Korvin, epriestley, aran

Differential Revision: https://secure.phabricator.com/D7644