UI time zone override option

The problem is on a Synology NAS/Docker:

Since the update to 0.106.1, the query log doesn't apply the container ENV TZ.

System time: custom TZ (set Synology DSM time)
Container TZ (set via ENV): custom TZ (shown via container terminal "date")
Container logs: custom TZ (shown via SSH "docker logs")
Docker time: UTC
AdGuard Home query log: UTC

This constellation, for example, leads to the absurd result that in the log of the Docker GUI, each line is cited as UTC. The actual log entry of each line then starts Correct with the container time.

Example (UTC+2):
`[Time: 14:15:03] [Log: 2021/05/05 16:15:03 info: something foo]`

Thank you for fixing!