Some minor CSS improvements

- Removes unit if value is 0
- Uses shorthand notation where possible

Signed-off-by: Michael Rosenberger <mr@simpelwebservice.de>

templates/misc/awstats/nav.html

@@ -12,7 +12,7 @@
             font: 12px/18px 'Lucida Grande','Lucida Sans Unicode',Helvetica,Arial,Verdana,sans-serif;
             color: #444;
             text-align: center;
-            background: none repeat scroll 0% 0% rgba(240, 242, 244, 0.85);
+            background: none repeat scroll 0 0 rgba(240, 242, 244, 0.85);
             border-bottom: 1px solid #DDD;
             box-sizing: border-box;
             -webkit-font-smoothing: subpixel-antialiased;

templates/misc/standardcustomer/index.html

@@ -12,11 +12,8 @@
 				padding: 0;
 			}
 			article {
-				
-				margin-top:20%;
-				margin-left:auto;
-				margin-right:auto;
-				margin-bottom:12px;
+
+				margin: 20% auto 12px;
 				width:500px;
 				min-height: 70px;
 				padding: 1em;