Priority button in the new message

Hi, I often use priorities when typing a new message, so the destination will understand how is important my email to read. WIth Thunderbird is not "immediate" as outlook to set a priority, I have to navigate inside menu. I would like to have a button to quickly select it like in outlook. Is it possible to ask for it? Or maybe someone who would kindly create an extension, thank you!

PS: please be careful, I'm talking about priority for sending a new message only; not about prioritize the email I received, there alre already extensions like this around, but not useful.