fix: reverse tab navigation
fix: reverse tab navigation

Reverse tab navigation seems to be broken from years, instead of going
back to previous field it jumps to primary button.

Root cause: when all fields are exhausted it's suppose to go to primary
button, however that's not the case for shift-tab.

mhbu50/frappe,almeidapaulopt/frappe,frappe/frappe,yashodhank/frappe,yashodhank/frappe,frappe/frappe,StrellaGroup/frappe,frappe/frappe,mhbu50/frappe,almeidapaulopt/frappe,yashodhank/frappe,mhbu50/frappe,almeidapaulopt/frappe,yashodhank/frappe,StrellaGroup/frappe,mhbu50/frappe,almeidapaulopt/frappe,StrellaGroup/frappe