HPCC-11585 Support various banner styles

Color, Size and Scroll Speed.

Fixes HPCC-11585

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Don't you think we should incorporate something such as: https://dojotoolkit.org/reference-guide/1.9/dojox/widget/ColorPicker.html so that the user does not have to guess a hex color value?