GSoC Update: Finalized /+tickets view with some more features

This week I worked on adding more features to the basic /+tickets view that was made last week.
Following are the features that are in this view

•  Now there is a search bar in this view by which user can search for text in comments, summary, itemid and tags. 
• There is also a filter option by which user can filter the results by priority, effort, severity and difficulty. User can click on any td element and the table gets filtered according to the value in that column. 
• I have also added buttons for viewing only Open, Closed or All tickets. by default only Open Tickets are being shown. 

Here is the screenshot of +tickets view.

Here is the codereview and commit for my changes.

Now I need to write tests for this view.