PageProcessor: fix not setting page_exists to true after create_page() success (todo: move to Namespace_*?); add $visible parameter to create_page()
.mcePageBreak {display:block;border:0;width:100%;height:12px;border-top:1px dotted #ccc;margin-top:15px;background:#fff url(../img/pagebreak.gif) no-repeat center top;}