updated StateSelector: now utilizes buttons instead of dropdown

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

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

@@ -130,6 +130,10 @@ tr:hover a{
     color: orange;
 }
 
+.states .active{
+    background: yellow;
+}
+
 .taglist .tag{
     border-color: orange;
 }