* [API] Added Indicators API
* [Indicators] Converted Follow Indicator to new Indicators API
* [Indicators] Converted URL Indicator to new Indicators API
* [Indicators] Changes to some legacy indicators for compatibility with new Indicators API
* [Indicators] Addressed code review items from https://github.com/nasa/openmct/pull/1837
* Updated tests for URL Indicator
* Adding Indicator API spec
* Address linting issues
* Switched to direct DOM manipulation rather than template compilation to avoid an unnecessary extra holder element
* Updated documentation to reflect changes to API
* Indicators api styling (#2076)
Updated styling for Indicators
* Update API TOC
* Fix color of items w-mct-example areas of Style Guide
Fixes#1837
* Status class refactoring and cleanups
Fixes#1837
- Significant cleanups and name refactoring to allow more
concise selector definitions, with changes in js, html and scss files;
- Updates in Style Guide > Status page, with some content
reorganization and clarification;
* Corrected out of date API
* de-zeptoed Indicator API test spec
* Remove promise from URLIndicator
* Separated legacy indicators support
* Updated Indicator specs to Jasmine 3
* Fixed checkstyle and lint issues
* Moved legacy indicators support to adapter folder
* Various fixes for Indicators
Fixes#1837
- Added SASS constants for Indicator colors;
- Removed commented code;
- Removed unused indicator classes from _messages.scss
- Fixed missing s-status-on class;
* Significant revisions to Style Guide Indicators content
Fixes#1837
- Better documentation including recommendations;
- Better and more concrete examples;
* Style Guide example tweaks
Fixes#1837
* Refinement to Style Guide Status and Limits content
Fixes#1837
- More detail and clarification on Status and Limits;
* Cleanup code
Fixes#1837
- Remove commented styles;
- Line return refinements;
