implemented highlighting of tiles on action edit

src/main/java/de/srsoftware/web4rail/actions/TriggerContact.java

@@ -25,6 +25,12 @@ public class TriggerContact extends Action {
 		return false;
 	}
 	
+	@Override
+	protected String highlightId() {
+		return isSet(contact) ? contact.id().toString() : null;
+	}
+	
+	
 	@Override
 	public JSONObject json() {
 		JSONObject json = super.json();