fix default course mode and checkout for variable default currency

Description

Includes fix to default course mode for variable PAID_COURSE_REGISTRATION_CURRENCY and checkout templates to use the setting on the "You are upgrading your enrollment for" (verify_student/upgrade) pages. USD was hard-coded. Respects use of HTML entity values for currency symbol (eg. £). Could have used the course mode currency but that is code only (no symbol). Let me know if I need to write any tests for this.

Also there were 2 meta definitions in the CourseMode class. Combined them.

Won't Do

Assignee

Unassigned

Reporter

Open Source Pull Request Bot

Labels

URL

Contributor Name

Rene Sorel

Repo

edx/edx-platform

Customer

None

Epic Link

None

OSCM Assignee

Ned Batchelder

Platform Map Area (Levels 1 & 2)

None

Platform Map Area (Levels 3 & 4)

None

Blended Hour Utilization Percentage

None

edX Theme

None

edX Squad

None

Github Lines Added

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Github Lines Deleted

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Priority

Unset