added translation for Yes/No
added translation for Yes/No

Since v13 the translation of the english No was "Kein". Which is not the right choice when selecting between yes or no. "Kein" is more something like none...
mhbu50/frappe,StrellaGroup/frappe,frappe/frappe,mhbu50/frappe,yashodhank/frappe,mhbu50/frappe,yashodhank/frappe,StrellaGroup/frappe,StrellaGroup/frappe,yashodhank/frappe,almeidapaulopt/frappe,almeidapaulopt/frappe,yashodhank/frappe,mhbu50/frappe,almeidapaulopt/frappe,almeidapaulopt/frappe,frappe/frappe,frappe/frappe