Enable banner colors by classification

[chazzlabs]

This request allows for banners to be colored according to classification by uncommenting and fixing the banner color CSS rules and adding an option to enable them; banners are not colored by default.

Screenshots of changes tested:

Webtop, pre-changes:

Webtop, post-changes with colors enabled:

Webtop, post-changes with colors disabled:

[mparizernc]

@chazzlabs we appreciate your pull request and would like to put it forward for our GOSS Board to determine if this should be included in the product. We have just formalized our patch process that can be found at https://ozone.nextcentury.com/patch_process. Please ensure that the following has been included so that it can be presented to the board:

• Add comments in the code to provide detailed developer-level documentation of your changes
• Verify that the entire code base builds without issue after all changes are made
• Document and provide unit/regression tests that verify that your new code functions and can be tested by others
• Submit complete and adequate documentation with the pull request explaining the feature(s) and how it works

Thank you again for your contribution to this project.