Hovercard front-end code & stuff

Summary:
Refs T1048; Depends on D5557, D5558

They hover right above your eyes. Try it out at home :D (in that case, don't forget to checkout D5557 and D5558)

Worth a lot of improvement. But it's great for now after a little bit of styling.

Scrape load (search current document for all hovercards and pre-load them) and lazy load (e.g. previewing comments which is not covered by scrape load) implemented.

Added some seemingly useful graceful situations. Too much to the left, too much to the top.

Test Plan:
Tested on Ubuntu, Chrome and FF. No Windows yet, since I have it live at no place. Works pretty fine, at least it will appear.

Could test left graceful fallback. Don't know what happens if you place it too far to the top. I expect either good results or placement about the center of the screen in case of glitches.

For now, they'll disappear right away once the mouse leaves the object tag. Intended is when leaving both tag and hovercard.

Reviewers: epriestley, chad, btrahan

CC: aran, Korvin

Maniphest Tasks: T1048

Differential Revision: https://secure.phabricator.com/D5563

Conflicts:

	src/__celerity_resource_map__.php
Use PhabricatorTagView in user mentions

Summary:
Refs T1048 - Use `PhabricatorTagView` in user mention remarkup rules. Emits hovercards now :D

Also introduces `PhabricatorTagView::COLOR_INEXISTENT`

Test Plan: Inspected HTML to find sigil & meta ref. Hovered above them (with hovercard patch, sold separately). Hovercard appeared.

Reviewers: epriestley, chad, btrahan

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T1048

Differential Revision: https://secure.phabricator.com/D5573
Include "Add CCs" and "Remove CCs" to batch editor

Summary:
Ref T2756

... didn't update celerity map, I'm on windows :)

Test Plan: Add CCs, Remove CCs, make sure everything else works.

Reviewers: epriestley

CC: aran, Korvin

Maniphest Tasks: T2756

Differential Revision: https://secure.phabricator.com/D5589
Get dem vitamins.
Load hovercards on-demand

Summary: See discussion in D5563. This loads hovercards on-demand, and shows them once they load. Ref T1048.

Test Plan: Made a preview comment like `T1`, waved my mouse over it, got a hovercard shortly thereafter.

Reviewers: AnhNhan

Reviewed By: AnhNhan

CC: aran

Maniphest Tasks: T1048

Differential Revision: https://secure.phabricator.com/D5588
Phame - "fix" blog feed

Summary: we don't post enough so this got reported as broken. Instead of specifying a published after date, just let the query class fetch the natural pagination limit ordered by id, and PHP will sort by publishedDate per usual. While its possible we might not get the right stuff relative to published date, its highly, highly unlikely given the large pagination size.

Test Plan: loaded up the blog xml link

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D5593
Fix typo in PHP string
Fixing a race condition for hovercards

Summary:
Refs T1048 - Take this setup:

D123 D321

Hover with the mouse over one object, and move to another one before it got loaded. You'll have two hovercards. Of these you can't get rid of one anymore. Not through resizing, not through showing another hovercard. (You may have to try a few times). I think it only happens when #2 loads faster than #1. #2 is displayed, then #1 gets loaded and draws.

Or something like that. You could have a race condition where one draws after another and overwrites the current node/anchor, without hiding it. This renders the previous card unhideable, even on resize / mouse far away.

Test Plan:
Did a repro by hovering a lot.

Applied this change. Could not repro anymore.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T1048

Differential Revision: https://secure.phabricator.com/D5594
Introduce some convenience methods for handle rendering

Summary:
So I don't have to copy/paste everything again.

Used them at places I could find with my limited `grep` skills.

Test Plan: Visited hovercards, revision and tasks. No crashes.

Reviewers: epriestley, btrahan, chad

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D5592
Adding hovercard event listeners for Users, Revisions, Conpherence and Commits

Summary:
Refs T1048

Adding Differential Hovercard EventListener

Adding People Hovercard EventListener

Adding basic Diffusion hovercard

Adding Conpherence Hovercard EventListener

Test Plan:
Used in a combo with working hovercards. So beautiful.

Also visited test page. Works alright.

awesometown

Reviewers: epriestley, chad, btrahan

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T1048

Differential Revision: https://secure.phabricator.com/D5576
Reduce wait_timeout to max. allowed value

Summary: http://dev.mysql.com/doc/mysql/en/server-system-variables.html#sysvar_wait_timeout

Test Plan:
  $ arc unit

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D5590
Specify `phd.start-taskmasters` in documentation

Test Plan: Read it.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D5591
Use (a = ? AND b = ?) instead of (a, b) IN (?, ?)

Summary: MySQL is not able to use indexes with searching for tuples.

Test Plan:
Explained the query before and after, saw `key_len` 16 instead of 8.
Also saw time 0.0 s instead of 2.9 s (but that was probably caused by warming up).

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D5580
Fix typo in comment
[SECURITY] Prevented PhabricatorSetupIssueView from exposing sensitive config options.

Summary:
Currently PhabricatorSetupIssueView will show the current values of
configuration options regardless of whether or not they are defined
as hidden options.  This means that if the MySQL server stops, Phabricator
will present the MySQL connection credentials to anyone who can access
the Phabricator page.

Test Plan:
Stop the MySQL server for a Phabricator instance.  It should display 'hidden'
instead of the MySQL password.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D5596
Merge branch 'master' of github.com:facebook/phabricator