Add ability to process "Enroll All Members" for all courses attached to a Memberhsip

[brianhogg]

Is your feature request related to a problem? Please describe.
In order to ensure students enrolled in a Membership are enrolled in Courses attached to the Membership, you need to click "Enroll All Members" for each Course individually. This can be time consuming if there are a lot of Courses.

Describe the solution you'd like
Some way, perhaps a button, that lets you initiate the Enroll All Members process for each course in one click. It should show the message that they are being enrolled in the background for each course.