Fix doc formatting.
Remove caution re grade exports + content experiments
Make staff debug info code to be always LTR
change ItemNotFoundErrors to log.warning in x_module.py
Convert icons on course_about to font awesome
Support and tests for adding a reset button to units

Users may want to start anew when answering a question. This commit decouples reset from randomization while still preserving backward compatibility. Users can clear their input.
Instructors can set course-wide and problem-specific settings for reset button display.
remove unused icon images
show warning on navigate away from import page only for first two stages
TNL-554
paver run_quality should run both pep8 and pylint diffs with -p flag

TE-555
Phase 1 of adding asset metadata saving to old Mongo
Merge pull request #5595 from Stanford-Online/caijim/resetbutton

Support and tests for adding a reset button to units
Merge pull request #4854 from edx/jeskew/assetstore_modulestore_work

Phase 1 of adding asset metadata saving to old Mongo
small UI fixes on dashboard for RTL
Merge pull request #5696 from Stanford-Online/giulio/course-about-font-awesomize

Convert icons on course_about to font awesome
Fix test page definition for course group configurations page
TNL-685
Merge pull request #5719 from edx/frances/fix/rtl-dashboard-fixes

small UI fixes on dashboard for RTL
Prohibit automatic enrollment in prof ed courses when user authenticates via third-party auth
Improve rerun test

for troubleshooting TNL-692
Merge pull request #5721 from edx/zoldak/fix-easy-access-test

Fix test page definition for course group configurations page
Update wording per Doc