Add an option to select if server or client time should be used

[KoMa1978]

The Time and Weather Simple Clock (probably other clock and/or date widgets as well) uses and displays the time of the client that has opened the vis site.

An option should be added to select if server time should be used (like "User Server Time"):

Reason for this request:
If you are accessing your smart home from vacation (different time zone) it is confusing that it displays 13:00 but at home it is already 18:00 or 19:00 (or vice versa).