MT#3931 Fix reseller fetch in customercontact test

(cherry picked from commit 8d7db3617162ca229b924f42147e3e636777e1ce)
(cherry picked from commit cf973c2e6198ff480bcdbf403b6559778964db1c)
MT#7051 set webusername to NULL if empty

because this does not trigger the unique constraint
(webuser_dom_idx) and it makes sense, because one cannot
login with an empty webusername anyway.

(cherry picked from commit cd9177b60f2c408d639c974fad7a7483e11a95e8)
(cherry picked from commit a3e36dd38684dcb0d75d9f4f62e34d633950d6ed)
MT#7183 show confirmation dialog on all languages

Show the dialog on "Terminate" and "Delete" buttons.

(cherry picked from commit 7ee9aa3f7a1e7be08b4374708b52633ce4a69568)
(cherry picked from commit c68fe3b23ef0f78a49b1da0d21243436dc03ec1f)