Maybe this is a bug, maybe not. We should decide if we should allow it or not, or add more advanced policies for it.

Example url: visual/templateedit/design/admin/templates/node/view/full.tpl/(siteAccess)/ezwebin_site_admin

When you currently use this url and click "apply" or "back to overrides" buttons, you will be redirected to visual/templateview without template parameter.