Open Your css.file at qa-theme/Snow/qa-styles.css
Find:
.qa-sidepanel {
float:right;
width:250px;
padding:10px 0 10px 10px;
min-height:80px;
}
.qa-sidebar {
font-size:14px;
margin:0 0 5px 0;
padding:20px;
background:#d0dfe4;
border-right:1px solid #b6c4c8;
border-bottom:1px solid #b6c4c8;
}
Now You can change:
.qa-sidepanel {
float:right;
width:240px;
padding:10px 10px 10px 10px;
min-height:80px;
}
.qa-sidepanel is the whole right bar, .qa-sidebar is the upper box on the right only. You can play aroyund with padding and margin and width in both classes to achgieve what You want.