An analysis task should be closed if a progression cause is identified

An analysis task should be closed if a progression cause is identified
https://bugs.webkit.org/show_bug.cgi?id=155549

Reviewed by Chris Dumez.

Since a progression is desirable, we should close an analysis task once its cause is identified.

Also fix some typos.

* init-database.sql: Fixed a typo.
* public/api/analysis-tasks.php:
* public/v3/models/analysis-task.js:
(AnalysisTask.prototype.dissociateBug): Renamed from dissociateBug.
* public/v3/pages/analysis-task-page.js:
(AnalysisTaskPage.prototype.render):
(AnalysisTaskPage.prototype._dissociateBug): Renamed from _dissociateBug.
(AnalysisTaskPage.prototype._dissociateCommit): Fixed the typo in the alert.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@198351 268f45cc-cd09-0410-ab3c-d52691b4dbfc