How to modify the bulk button

[arvas]

Hi,

So the queue view has this handy feature with the bulk checkboxes next to each ticket. The only problem is, the box is really small.. when you are sorting out spam and you accidentally click outa the box after selecting a bunch of mails, you lose all the checks you had done earlier and have to start all over.
I wana try to make the box a lil bigger to reduce this issue, any idea which part of the code i should modify to accomplish this?

thanks!