preparing to re-implement message settings

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

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

@@ -100,6 +100,10 @@ nav a.mark::before {
     content: " ";
 }
 
+nav a.message::before {
+	content: " ";
+}
+
 nav a.note::before {
     content: " ";
 }
@@ -133,6 +137,7 @@ nav a.contact,
 nav a.doc,
 nav a.file,
 nav a.mark,
+nav a.message,
 nav a.note,
 nav a.project,
 nav a.stock,