'Break sync' button in Data collection module
When someone drop data from My Turris portal ( https://project.turris.cz/cs/data/ ) there's no hint, how to connect router again. And from web interface of router in Data collection module it's also not very intuitive, because router doesn't know anything about dropped relation from web. So user must uncheck 'Enable data collection' and press 'save' button first. Than it's possible to make new connection.