User Manager/QA/Incorrect time shown for sessions and credits

Each User Manager user's session is stored with the 'From Time' and 'Till Time' values.

Subscriber 'time-zone' value

/ tool user-manager customer set subscriber=MikroTik time-zone=...

has to be equal to 'system clock' time-zone, then 'From Time' and 'Till Time' values are accounted with time even to 'system clock'.