How to Modify Column Width in Admin Dashboard

[dkinzer]

I'd like to modify the width of the column that contains the accordian menu. However, I can't find where that is set. In the attached image you can see that some of the entries are oddly wrapped such as "Products Attributes".

I was able to modify the box width for the left and right columns in the customer-facing store display but it appears that a different mechanism is used in the admin dashboard. Can anyone describe how to change the column width in the admin panel?

[Hotclutch]

#adminAppMenu {
  float: left;
  width: 150px;
  padding: 5px;
}

admin/includes/stylesheet.css