Suboptimal solution for one of the issues behind bug 12049 (i.e. that

Suboptimal solution for one of the issues behind bug 12049 (i.e. that
don't get deleted from search index) :
* hooks ArticleDelete[Complete] are now called from FileDeleteForm as well,
  this seems to be the expected behavior by most extensions (OAI, TitleKey,
  Rsync, ...).
* delete via API however still misses these hooks

Other possible solutions:
* move hooks into backend - bad since we want a clean backend
* create FileDelete hook (per bug 11276) - seems to me as unnecessary
  duplication of code logic since article might or might not be
  deleted during file deletion
* make a new Article function and wrap calls - will pollute clean Article
  doDelete and doDeleteArticle calls