Which of these is right?<br/><br/>1)How many times have you wanted to split the screen into half so that you could have two different windows in each half of the screen?<br/><br/>2)How many times have you wanted to split the screen into half, so that you could have two different windows in each half of the screen?<br/><br/>In the second sentence I put a comma after the word "half".<br/><br/>Please explain the reason too. Thanks