- use new dates banner template on course outline page
- remove old banner from main.html
- let dates tab use new dates banner template
- remove dates banner completely from the courseware problem view
on the web app
- use new banner on the courseware problem view on the mobile app
- update banner util to use get_course_blocks
Added a banner to introduce learners to the Dates Tab.
The banner is hidden when the learner has missed deadlines.
Refactored naming conventions in the dates sass file to better
reflect the function of our banners.
AA-156
The dates tab has a lot of redundant calls to action around
upgrading to verified track. This replaces them with a single
banner at the top of the page.
AA-102
