title: ExtJS: Combobox after reload store dont set value
body: <p>I think I have a very popular problem, but not found answer for it now. :) 
  I got 2 similar comboboxes - at first i set my value by id - <code>comboT.setValue("22763");</code> and it properly set a text value linked with this id.
  At second combobox i at first reload store(jsonstore) and then set value - <code>comboC.setValue("3");</code> But this combo set only ID not text value (if i open list i can see what combo properly marked text value. And after (if list simply close without select) text value properly displayed at combo.
  How to solve this problem?
  Thanks.</p>