In the burndown report, if we have a quite few sprints in the board (something like 30 or more), it`s a pain to select one specific Sprint (in fact, it`s not possible, only if you use the down or up arrow in the keyboard and guess the Sprint).

We need a way to select the other Sprints in this list, since we can`t do this today.

It would be great if we can have something like a filter there, to show only recent sprints, or an auto-complete text box, then we can search the Sprint by the name.

Tested using Google Chrome, Firefox and IE.