[TASK] Removed custom link.action view helper

Since Extbase allows the configuration of default pages depending
on the current action the feature does not need to be rebuild in
the link.action view  helper.

The view helper was removed and the view helpers in the templates were
replaced with the fluid action link view helper.
[FEATURE] Improved back link for list view

The link to the detail view appends the current query string so that
it is possible to link back to the original query in the detail view.

This is realized by setting the addQueryString parameter of the
link.action view helper to true in the list view and the detail view.