text by using the error colourColour the text by using the error colour
valErr_TextErrCol(text, error, addError = TRUE)to be coloured. if not supplied, the coloured error text will be
returned. If text is of class dmdScheme_validation, the
function will be called with text = text$header, error = text$error
either level, text or colour of error (see valErr_errorLevels)
if the error text should be added in the front of the text.
the coloured text or error text