Typo in comment and clarification of function PMA_configErrorMessage()

Fixed typo (configurartion -> configuration).

I'm doing the Danish translation, and the string "Central list of columns configuration Storage is not completely configured!" is difficult to understand - and I suggest rewriting it or providing a comment to translators if possible.


/**
 * return error message to be displayed if central columns
 * configurartion storage is not completely configured
 *
 * @return PMA_Message
 */
function PMA_configErrorMessage()
{
    return PMA_Message::error(
        __(
            'Central list of columns configuration Storage '
            . 'is not completely configured!'
        )
    );
}