Additional help text

[brianhogg]

• [x] Get the admin table JS minifying

Description

• Added back a video thumbnail that links to the Getting Started article on lifterlms.com
• Added note under Checkout and Dashboard pages selection dropdown with the required shortcode or block
• Added Launch Course Builder to the WP Admin Bar when viewing a course
• Added Launch Course Builder button when using the Classic Editor, beside “Add Course” button
• Added “Clear cache” button on admin reporting page

Refs #2625

How has this been tested?

Manually

Screenshots

Types of changes

Checklist:

• [x] This PR requires and contains at least one changelog file. <!-- To create a changelog yml file: npm run dev changelog add -- -i and follow the prompt. See also: https://github.com/gocodebox/lifterlms/blob/trunk/packages/dev/README.md#changelog-add -->
• [x] My code has been tested.
• [x] My code passes all existing automated tests.
• [x] My code follows the LifterLMS Coding & Documentation Standards.