Recognize 'allocated' as a waiting state in the UI
Recognize 'allocated' as a waiting state in the UI

Summary:
'allocated' is a state between 'pending_allocation' and 'running', and the UI
code should recognize it as indicating a build that is not yet done.
This has the consequence of allowing us to cancel builds stuck in 'allocated'.

Test Plan: None

Reviewers: naphat

Reviewed By: naphat

Subscribers: changesbot, anupc

Tags: #changes_ui

Differential Revision: https://tails.corp.dropbox.com/D225572

dropbox/changes,dropbox/changes,dropbox/changes,dropbox/changes