Update user instructions, urgent.

[Psyboyo]

Please update user instructions: For new users, or even regular casual users who don't normally install add-ons, after installing this there is no instructions on how to start and how it works. A simple update like this would prevent unnecessary frustrated users:

"FIRST STEPS: How to start MinimizeToTray Reanimated

Go to the Thunderbird Menu (top right, the 3 horizontal lines icon), click on 'Add-ons' and then 'MinimizeToTray Reanimated': This will open the preferences window, where you can choose the add-on's behavior."

Keep up the good work.