Opera uses your system's password storage facility to store saved passwords, but your system still requires your login password to access this password storage. Unless you'd rather install an extension which stores your passwords "in the cloud", nothing to do about it. (You really want anyone with physical access to your computer to have your logins for your bank, your email and social media, etc.?)
Nothing can be done about it??? You're kidding......right? FYI, I don't bank online, I don't do social media and I don't put anything in Email that I don't want the NSA looking at!
Looks like this junk is coming off my system then.
Oh, and while you're at it, go ahead and delete my account here!