Documentation for QFileDialog::DontConfirmOverwrite should mention QFileDialog::AcceptMode

Setting QFileDialog::DontConfirmOverwrite to false (i.e. asking for confirmation when selecting an existing file) only works if QFileDialog::AcceptMode is set to QFileDialog::AcceptSave. This in itself is not really an issue and rather logical.

However there is no indication of that in the doc, meaning that when building its own QFileDialog it is very easy to overlook QFileDialog::AcceptMode and wrongly assume that QFileDialog::DontConfirmOverwrite does not work.