title: How to pass widget values from one tab to another tab in GXT?
body: <p>Im using GXT 2.1.1, I want to to pass widget values from one tab to another tab.For Example I have created two tabs, the first tab displays all the information of students
  in a grid with name, date of join, course selected .... and in other tab i want to
  display the student information. When ever a user selects the student from the
  grid then that should take him to the next tab with all the details of that particular
  student.</p>