Make use of django_main for password_reset templates

Remove duplicated code and make sure those views use the same visual
identity.
Update password reset views style

Reuse the style from login and register views.
Remove all the specific style.
Fix 'change my password' button font size
Add missing endif in crystallography mako template
Fix Studio to gracefully handle xblock JavaScript errors

TNL-46

I've changed Studio to catch JavaScript errors when rendering xblocks, log the error, but to then continue as normal. This means that the user is still able to interact with the xblock to delete, duplicate etc. This seems reasonable as the xblock is only rendered as a WYSIWYG representation so if it isn't fully interactive that shouldn't be a big problem.
Merge pull request #4913 from edx/andya/handle-component-errors

Fix Studio to gracefully handle xblock JavaScript errors
Fixed analytics counts on instructor dashboard.
LMS-11228
Passed cls=EdxJSONEncoder on json.dumps to fix save, edit and import.
STUD-2096
Bok-Choy Video Transcript Tests Batch 2
Merge pull request #4922 from edx/waheed/lms11228-fix-instructor-dash-analytics-count

Fixed analytics counts on instructor dashboard.
Merge pull request #4850 from edx/waheed/stud2096-fix-export-with-old-ora

Fix export course with old ORA components.
Allow one group in a group configuration.
Merge pull request #4920 from edx/oleg/allow-one-group-in-configuration

Allow one group in a group configuration (BLD-1223)
Merge pull request #4869 from edx/ammar/bok-choy-video-transcript-tests-batch2

Bok-Choy Video Transcript Tests Batch 2
Merge pull request #4145 from IONISx/tusbar/rewrite-password-reset-templates

Make use of django_main for password_reset templates
Merge pull request #4927 from mitocw/cg/add_missing_endif

Add missing endif in crystallography mako template
Added Jonathan Piacenti to the AUTHORS file.
Merge pull request #4933 from Kelketek/jp_authors

Added Jonathan Piacenti to the AUTHORS file.
Verify children are rendered before allowing drop into collapsed parent.

TNL-56
Clarify the effect of changing problems