* Styling for plot limits and colors
* Updates to limit provider and css
* Change limits related CSS "*--upper" and "*--lower" to "*--upr" and
"*--lwr" for better parity with legacy naming;
* Refactor limit class to util
* Use new classes for sine wave generator for red-low and yellow-high
* Added modifier classes for right and below-aligned labels;
* Prevent label overlap of limits as much as possible
* Add border colors to limit labels for better visual ties to their lines
* Add documentation for limit level specification API change
Co-authored-by: Shefali Joshi <simplyrender@gmail.com>
Co-authored-by: Andrew Henry <akhenry@gmail.com>
