Calendar Events Take Focus
One of the more aggravating aspects of Thunderbird's calendar is when an event alerts me that event grabs focus from whatever I am doing at the moment. I have no interest in having Thunderbird yell at me to stop what I'm doing and pay attention to the alert like a 5 year old. I am often deeply involved in other work and never appreciate Thunderbird's calendar interrupting me.
Is there somewhere in Thunderbird where I can tell Thunderbird that the calendar can pop open and make a sound but under no circumstances is it to take focus from where it is at the moment?