Use generic page template for bookmark and lazy chat lists.

Change-Id: I86cc78c8164d6672d8b5cfbc2a3433954068967e
diff --git a/src/main/java/eu/mulk/mulkcms2/benki/generic/Post.java b/src/main/java/eu/mulk/mulkcms2/benki/generic/Post.java
index 898eeb4..7d75bb4 100644
--- a/src/main/java/eu/mulk/mulkcms2/benki/generic/Post.java
+++ b/src/main/java/eu/mulk/mulkcms2/benki/generic/Post.java
@@ -75,6 +75,10 @@
       inverseJoinColumns = @JoinColumn(name = "target"))
   public Set<Role> targets;
 
+  public abstract boolean isBookmark();
+
+  public abstract boolean isLazychatMessage();
+
   protected static <T extends Post> CriteriaQuery<T> queryViewable(
       Class<T> entityClass,
       SecurityIdentity readerIdentity,