Add inherit option to Course Outline block and increase max number of…

[seothemes]

Description

• Adds Inherit from current course option to Course Outline block when editing Single Course template.
• Increase maximum number of courses shown in drop down select (for all blocks using component)

How has this been tested?

Manually

Types of changes

Bug fix (non-breaking change which fixes an issue)

Checklist:

• [x] This PR requires and contains at least one changelog file.
• [ ] My code has been tested.
• [ ] My code passes all existing automated tests.
• [x] My code follows the LifterLMS Coding & Documentation Standards.