detect time-related SSL errors and show "Your clock is ..."

[Ivshti]

Like chrome, treat SSL errors related to time a bit more friendly and show "Your clock is.."

[Ivshti]

from the qt docs

The WebEngineCertificateError::error and QWebEngineCertificateError::Error enumerations provide information about the types of certificate errors that might occur. The errors can be handled by using the WebEngineView::certificateError QML method or by reimplementing the QWebEnginePage::certificateError function.