minor tweaks

thanks to david tenser for the patch

mail/locales/en-US/chrome/messenger/start.html

@@ -49,11 +49,11 @@ h2 {
 	margin-left: 25px;
 	margin-right: 25px;
 	background: url(thunderbird-watermark.png) no-repeat top right;
-	min-height: 320px;
+	min-height:  280px;
 }
 
 p, li {
-	font-size: 85%; /* looks better, bz! */
+	font-size: 85%;
 	letter-spacing: 1px;
 }