Support for AricleTypeID and SenderTypeID in ArticleContentIndex and ArticleGet
Switch TicketArticleFilter to be SQL based
Show article tree if ArticleFilter is set

otherwise there is no way to delete the filter if it matched no article
Move SQL generation to DBObject
Extend ArticleCount and ArticlePage

they now respect ArticlerSenderTypeID, ArticleTypeID and Order
AgentTicketZoom: Tweak ordering, selection of first article