Here's a CSS fix for that:
Go to your admincp => Styles & Templates => Style Manager => same style you edited before but choose Main CSS from the dropdown [All Style Options]
At the very bottom, under Additional CSS Definitions, scroll to the bottom of the top box and enter this code after everything else...
Code:
dl, dt, dd, ul, li { margin: 0; padding: 0; list-style-type: none; }
#menu { width: 175px; }
#menu dt { cursor: pointer; background: #FFFFFF; height: 20px; line-height: 20px; margin: 2px 0; border: 1px solid gray; text-align: left; font-weight: bold; }
#menu dd { position: absolute; z-index: 100; left: 8em; margin-top: -1.4em; width: 15em; background: #FFFFFF; border: 1px solid gray; }
#menu ul { padding: 1px; }
#menu li { text-align: left; font-size: 85%; height: 18px; line-height: 18px; }
#menu li a, #menu dt a { color: #000; text-decoration: none; display: block; }
#menu li a:hover { text-decoration: underline; }
#mentions { font-family: verdana, arial, sans-serif; position: absolute; bottom : 200px; left : 15px; color: #000; background-color: #ddd; }
#mentions a { text-decoration: none; color: #222; }
#mentions a:hover { text-decoration: underline; }