[fix] commit 2c6531b2 breaks the unit test, this is a hotfix

commit 2c6531b2 does not only break the unit test, it is a significant change of
the data model and the searx search-syntax model (UI) without any discussion nor
documentation.

At the end, adding routes to instant answers is a nice feature but commit
2c6531b2 leaf some questions open.

In that sense, this patch is only a hotfix not a assessment.

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>