All the HTTP clients now check, if loading the cookies was sufficient
to restore the HTTP session. If yes, we assume that we are logged in.
If not, the normal login procedure is done.
This dialog is shown, if the normal login didn't work. For example,
if you log in several times in a short amount of time, they respond
with "Please confirm that you are not a robot" and you have to log
in with a captcha
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