Internet Explorer compatibility fixes

Summary:
A few fixes for IE that makes this work in IE9+ and at least you can drag things and have it fail horribly in IE8 now. Ref T5023.

 - try / catch around getBoundingClientRect because IE throws if the object is not attached to the DOM. The correct value can be inferred in these cases as 0,0
 - turns out IE has different values for button here (1,2,4) than other browsers. special case this by using the other IE fact that 'which' will be null

Test Plan: dragged and dropped tasks successfully in IE9, IE10, and IE11 on Windows 7. dragged and dropped tasks unsuccessfully in IE8 on Windows 7 - they always "drop" to the 2nd position or so as I think the ondrag code isn't firing properly or something

Reviewers: chad, epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T5023

Differential Revision: https://secure.phabricator.com/D9118
Provide more context on what "Lock Permanently" means in the UI

Summary:
Administrators may encounter this UI for the first time when configuring a repository, without ever having used Passphrase before. If they end up here on a workflow like this, the meaning of "Lock Permanently" may not be totally clear. Add some explanatory text.

(See also T4721, which discusses Passphrase documentation more generally.)

Test Plan: {F154209}

Reviewers: lpriestley

Reviewed By: lpriestley

Subscribers: epriestley

Differential Revision: https://secure.phabricator.com/D9102
Calendar - make calendar publicly accessible

Summary: yay public policy. Ref T4830.

Test Plan: browsed about calendar from a logged out browser

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T4830

Differential Revision: https://secure.phabricator.com/D9120
Notifications - hide header dropdown if app is uninstalled

Summary: Fixes T5019.

Test Plan: uninstalled notifications and dropdown disappeared too

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T5019

Differential Revision: https://secure.phabricator.com/D9121
Update FontAwesome to 4.1.0

Summary: 71 new icons! Pied Piper!

Test Plan: tested new icons on UIExample. Perused a few other pages in Maniphest, Differential. No issues noted.

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D9125
If PhabricatorIRCBot encounters a 'nick used' error, try adding a number

Summary: Someone stole my bot's name, so the bot couldn't (re)connect. This tries adding some text to the name if it encounters a 433 'nick in use' error

Test Plan: Started a ton of bots: F154744

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D9123
Fix "Recently Closed" column for custom task statuses

Summary: Fixes T5056.

Test Plan: Viewed locally, saw numbers.

Reviewers: btrahan, shadowhand

Reviewed By: shadowhand

Subscribers: shadowhand, epriestley

Maniphest Tasks: T5056

Differential Revision: https://secure.phabricator.com/D9126
Pass correct number of parameters to pht() when closing a branch in Mercurial

Summary: Ref T5050. This fixes the immediate error (bad pht()) but doesn't fix the other error (can't `--close-branch`) yet.

Test Plan: Pushed a `--close-branch` commit, got a first-level error instead of an error about an error.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T5050

Differential Revision: https://secure.phabricator.com/D9119
Allow branch deletions to be pushed in Mercurial

Summary: Fixes T5050. This might not be 100% right in all edge cases, but it worked on everything I tried.

Test Plan:
  - Pushed a branch deletion.
  - Pushed a branch creation.
  - Pushed a brnach creation + deletion.
  - Pushed a brnach deletion + creation.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T5050

Differential Revision: https://secure.phabricator.com/D9122
When a conduit method requires a string constant, call it "string-const" not "enum"

Summary: Ref T5058. The use of "enum" is confusing; we mean "choose one of these specific string constants". Make this more clear.

Test Plan: Viewed each call from the web UI.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T5058

Differential Revision: https://secure.phabricator.com/D9127
Fix a missed call to setCommit() on DiffusionRequest

See: <https://github.com/facebook/phabricator/issues/608>

Test Plan: Viewed a Subversion diff. Grepped for `setCommit()` again.

Auditors: btrahan
Use font icons on user approval queue

Summary: Fixes T5066.

Test Plan: {F155058}

Reviewers: chad, btrahan, shadowhand

Reviewed By: shadowhand

Subscribers: shadowhand, epriestley

Maniphest Tasks: T5066

Differential Revision: https://secure.phabricator.com/D9133
Show command transactions in Harbormaster builds

Summary:
Create transaction, editor, etc, and move command generation over to editor.
Show in a timeline in the buildable page.

Also prevent Engine from creating an empty transaction when build starts (Fixes T4885).

Fixes T4886.

Test Plan: Restart builds and buildables, look at timeline.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T4885, T4886

Differential Revision: https://secure.phabricator.com/D9110
Fix some logic in WaitForPreviousBuildStep

Summary: Fixes T5062. See inlines.

Test Plan: Did not test whatsoever.

Reviewers: hach-que

Reviewed By: hach-que

Subscribers: epriestley

Maniphest Tasks: T5062

Differential Revision: https://secure.phabricator.com/D9132
Merge branch 'master' of github.com:facebook/phabricator