* Simply print timestamp for supported destinations
* Update ws destination to support 'prefix' sub-key
* Avoid void casting in telnet module

Python cleanup

#1519 Esp-01 + 2ch 5v relay LC tech Exclusive relay on

Support PMS5003S

* send all ws config at once on start
* reduce ws json overhead by creating message buffer manually
* use k:[values] instead of k1:value1, k2:value2 etc. for lists

Fix pulse for dummy relays

ONLY processes Domoticz RGB MQTT Messages for the current idx

Configure Heartbeat from WebUI & option HEARTBEAT_REPEAT_STATUS

Use built-in fauxmoESP HTTP handler when WEB_SUPPORT=0

This reverts commit 7ad0e3a02b.

Fix compile error when both RF_SUPPORT and API_SUPPORT are enabled

- Heartbeat mode and interval configuration added to WebUI ADMIN page
- New option HEARTBEAT_REPEAT_STATUS: on device startup full heartbeat information and after HEARTBEAT_INTERVAL only STATUS report.
- Enhanced first heartbeat message - on device startup it will send heartbeat after ntpSynced will be true to get device time.

P.S. Code is tested. Web part is not compiled, and not tested. I hope it will work :)