Tweak audit status colors.

Summary: Fixes T3242. Changes the red and orange objects to match the transactions. Also adds a highlight color to 'cards'.

Test Plan: Review my audits in my sandbox

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T3242

Differential Revision: https://secure.phabricator.com/D6184
Add a setup issue to warn about an unconfigured upload limit

Summary:
Ref T3354. There's no way for us to test most of the config options which actually affect this limit, so the Phabricator config is basically a canary value to indicate "the administrator hasn't configured anything yet".

Raise a setup issue if it isn't set. There's a trail to get here from Files, but we've de-emphasized the old-school upload form so it's hard to unearth.

Emphasize the warning that you need to read the documentation and configure like 30 other things to make this work.

Test Plan: Cleared my config, verified I got the issue, read it, set my config, issue went away.

Reviewers: jamesr, chad

Reviewed By: chad

CC: aran

Maniphest Tasks: T3354

Differential Revision: https://secure.phabricator.com/D6185
Add authentication icon

Summary: its a lock - Fixes T3341

Test Plan: surprise!

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T3341

Differential Revision: https://secure.phabricator.com/D6187
Fix hovers on mobile menus.

Summary: Restrict the menu hovers to desktop

Test Plan: test desktop and mobile

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D6190
Add Login icons to PHUIIconView.

Summary: Prepping to use.

Test Plan: UIExamples

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D6191
PHUIButtonView class

Summary: Rough pass at a PHUIButtonView Class. Keeps phutil_tag intact and adds some image features if you use the class.

Test Plan: UIExamples

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D6192