BUG Retain page search state on list view actions (fixes #7648)
BUG Retain page search state on list view actions (fixes #7648)

The ".action-detail" link behaviour overloads GridField's
showDetailForm() method, which in turn appends any query params
to the URL (including the existing search params).

silverstripe/silverstripe-cms,silverstripe/silverstripe-siteconfig,silverstripe-labs/silverstripe-reports,silverstripe-labs/silverstripe-reports,helpfulrobot/i-lateral-silverstripe-siteconfig,jonom/silverstripe-cms,silverstripe/silverstripe-cms,dhensby/silverstripe-cms,jonom/silverstripe-cms,dhensby/silverstripe-reports,dhensby/silverstripe-reports,dhensby/silverstripe-cms,dhensby/silverstripe-cms