[#2380] fix bug task drag and ui in ie9
[#2423] fix bug project member's dropdown in project show
[#2383] make the avatar and role right in the project system.
[#2427] add  favicon.js to display notification
[#2406] add # for display issues
[#2413] fix bug attachment's name disappear in older browser
[#11087] fix bug planner home logout
[#2428] refactor issues controller ajax load

[#2428] extract the issue perpage to a  constant
[#2503] make the notification zone large
[#2537]  change css for safari use experience
[#2555] fix the @ bug