added menu symbol for accounting

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

web/src/main/resources/web/css/default.css

@@ -77,6 +77,10 @@ nav a::before{
     font-weight: normal;
 }
 
+nav a.accounting::before {
+	content: " ";
+}
+
 nav a.user::before {
     content: " ";
 }
@@ -137,6 +141,7 @@ nav a.wiki::before{
     content: " ";
 }
 
+nav a.accounting,
 nav a.company,
 nav a.contact,
 nav a.doc,