saving the settings changed the URL from Admin to Search

Hy guys,

seems that saving any settings of the plugin using the Admin (latest) GUI will change the url from

` domain.com/admin/plugin/simplesearch ` to ` domain.com/search/plugin/simplesearch `

which causes an issue

Reproduce saving any plugin setting in the latest Admin GUI and compare the resulting URL with the reported paths. Trace the settings form or route target responsible for the redirect; done means saving from `domain.com/admin/plugin/simplesearch` keeps the URL in the Admin path rather than changing it to `/search/plugin/simplesearch`.

Written by the indexing model from the issue text.