improvemnts:

- ordering of bookmarks
- limitation of bookmarks on index page
- date for bookmarks that did not have a date before the transition

bookmark/src/main/java/de/srsoftware/umbrella/bookmarks/SqliteDb.java

@@ -69,10 +69,10 @@ CREATE TABLE IF NOT EXISTS {0} (
 	}
 
 	@Override
-	public Map<Long, Bookmark> list(long userId) {
+	public Map<Long, Bookmark> list(long userId, long offset, long limit) {
 		try {
 			var map = new HashMap<Long,Bookmark>();
-			var rs = select(ALL).from(TABLE_URL_COMMENTS).leftJoin(URL_ID,TABLE_URLS,ID).where(USER_ID, equal(userId)).exec(db);
+			var rs = select(ALL).from(TABLE_URL_COMMENTS).leftJoin(URL_ID,TABLE_URLS,ID).where(USER_ID, equal(userId)).sort(format("{0} DESC",TIMESTAMP)).skip(offset).limit(limit).exec(db);
 			while (rs.next()){
 				var bookmark = Bookmark.of(rs);
 				map.put(bookmark.urlId(),bookmark);