Move TagFieldWithTaggingsPresenter param 'viewed_from' to initializer

* Because I don't know how to pass parameters to the to_html method
  for an Erector::Widge
* Fixes bug with unneeded table columns showing in certain contexts,
  like column 'name' of tag, even though we are on the tag page
* Bug was introduced when refactoring presenter as an Erector::Widget