Issue #3001990 by alonaoneill, volkswagenchick, chipway, andrey.troeglazov: Dependency namespacing in .info.yml file

Issue #2844843 by aks22, andrey.troeglazov: Removed deprecated usage of SafeMarkup::checkPlain from the codebase

Converted block hooks to plugins, removed theme function in favor of table form item and fixed vertical tab grouping.

Converted block hooks to plugins, removed theme functions in favor of table form item and fixed vertical tab grouping.

Issue #1934764 by Devin Carlson: Added versioned dependency on the 2.x release of the Libraries API.

Issue #1871450 by Devin Carlson: Added an alter hook to allow slider theme information to be modified.