[RFC] Graph controls now handled by jquery.t.js itself.

The button click event listeners and the corresponding behavior are now
implemented in `t.js` itself, requring `ss.js` to call only one `graphIt`
function on the appropriate element.

I have tried to proceed in the direction as discussed. Can you please 
provide some reviews on it?

I feel that there are too many methods (all) public/directly accessible. 
Also, I guess the efficiency can be improved in some ways, which I'm 
not aware of.

Original SHA: b1a967c, 59b641d
New SHA: 9e28510

Signed-off-by: Vivek Rai <vivekraiiitkgp@gmail.com>