Eva, thank you for the answer.
Re: 'click twice' to toggle and repeating the process after a reboot
My computer functions as yours, I suspect, for the following reasons:
1/ When I configured my laptop I choose 'double-click' rather than 'single-click' for opening applications and files.
2/ I have an application installed (Ccleaner) that daily empties the computers buffers, and that process deletes the cookie from WikiTree that informs this website of my log-on preferences. WikiTree does not forget my preference, rather it is my computer no longer having the cookie instructions.