Events for entering verified flow & buying
Added refund datetime info to Orders, OrderItems

Finance would like to have info about the date any given refund is requested.

This commit adds a refund_requested_time field to OrderItem and a refund_time to Order.

When a user *requests* a refund, the refund_requested_time field on OrderItem is updated; when a user actually *receives* their refund, the refund_time on Order is updated.

Note that only the refund_requested_teim field is actually used right now; later on, when we're able to actually automate the process of actually giving users refunds, we will start usings Order's refund_time field.
Response to CR
Quick fix
Response to CR
Added alternate upsell copy flag

For waffle / split testing purposes
Added segment.io tracking
Activate Markdown editor buttons on keypress

The buttons now activate on pressing space or enter.

JIRA: FOR-66
response to cr
Remove forum user profile moderator toggle button

This button has been broken for at least a year, so the code has
suffered from bit rot and should be reimplmemented if the feature is
necessary in the short term (which is unlikely since it has been broken
for so long).
Remove extraneous refund text

Bug: LMS-1603
BLD-479: Add additional example of DnD.
Created "MathJax in Studio" page

Created "A Brief Introduction to MathJax in Studio" page (as appendix
G) and included a link in "Math Expression Input" topic.
Remove old READMEs

These files seem to have been copied over from old XML courses,
and shouldn't be in our repository.
Add debug logging of exceptions that happen during rending of studio_view or student_view in Studio
Fix bulk email acceptance test
Acceptance tests for grades download

Refactor instructor dash acceptance tests.
Add additional acceptance tests for buttons on 'Data Download' tab.

LMS-58
Fix LTI acceptance tests
Add underscore to staff grading template
ORA-237: Number in "Available for Grading" column drops rapidly

Added the following under "Grade an Open Response Assessment Problem":

After you've graded enough responses for AI assessments to start, the
number of responses in the Available to grade column decreases rapidly
as the algorithm grades responses and returns them to your students in
just a few seconds. No student data is lost.

Also corrected a few minor formatting problems.