android4.0,setting modele,modify the background width
<p>android4.0,setting modele,the background is not align around the screen width which is displayed by <code>preferencecategory</code>,but in the align listitem,how to change the background for the width?</p>

<p>4.0 system Settings module default so，I want to to align to screen，but i don't know where is to change in theme.holo</p>
