Removed the debug logging line from the Task decorator.
Also make use of the next_start_key as name for the new starting key.
.mceLinkList, .mceAnchorList, #targetlist {width:280px;}
.mceActionPanel {margin-top:7px;}
.panel_wrapper div.current {height:320px;}
#classlist, #title, #href {width:280px;}
#popupurl, #popupname {width:200px;}
#popupwidth, #popupheight, #popupleft, #popuptop {width:30px;vertical-align:middle;text-align:center;}
#id, #style, #classes, #target, #dir, #hreflang, #lang, #charset, #type, #rel, #rev, #tabindex, #accesskey {width:200px;}
#events_panel input {width:200px;}