In the log I saw something like: Chart BTC AutoCLose after 182 sec (> 180), what does it mean?

This entry in the log says that the window with the BTC coin chart is automatically closed according to the settings of auto-close charts on the tab Settings – Advanced -System (the slider “Auto close charts after 3 minutes of inactivity”), in this case the slider was on “3 min” = 180 seconds and was closed after this time.