i18n: Replace hard-coded "Outdated" message
Review: Attach "Outdated" label on outdated review card
indent arrangement
FontAwesome: remove unused font
Remove `pressed` effect from watching button
Changes width and align of `Commit Date` column on `Code` menu.

Cause:
`Commit Date` string, a column title, can not be shown as one line on a div following `span1` class because of long.

Solution:
A class which is stylesheet for the column title is changed to `span2` class.
Also `text-align` of all the column's data is set to `right`.

Private-issue: 1518
Merge branch 'boardapp-indent-arrangement' of fulbert/yobi

from pull request 1032
mention: refactoring mention feature

  Also, it fix mention bug when modifying comment
Merge branch 'feature/show-whether-review-thread-is-outdated' of npcode/yobi

from pull request 996
Merge branch 'fix/mention' of doortts/yobi

from pull request 1050
formatting
Home: performance tuning

The event view loads all notificationEvents related with a user and slice it. Also, this operation is called twice in it.

First of all, I've fixed to load notificationEvents that only to show in this view. Last but not least, I've refactored the view to use @defining to load the events only once.
Login: added ajax dialog form
Login: clicking comment, vote button shows login dialog
Merge branch 'login-ajaxform' of laziel/yobi

from pull request 1029
Merge branch 'enhancement/issue-1481' of whiteship/yobi

from pull request 1035
Merge branch 'issue-1518' of changsung/yobi

from pull request 1048
Editor: Fix The uploaded image file could not be put into the body of editor

- change selector syntax for textarea
- add data attribute for javascript selector on textarea : data-editro-mode="body"
- fix javascript error for validation at milestone
Add login button on forbidden error page
fix indents