Remove cruft from user profile threads

This removes the vote button from threads on the user profile, which was
the only interaction available on the page other than the link to view
the thread in the main discussion view.
Add pagination to forum user profile page
Removed trailing periods in two scenario names
Merge pull request #3456 from edx/clytwynec/remove-trailing-periods-in-scenario-names

Remove trailing periods in scenario names
Merge pull request #3391 from edx/gprice/user-profile-pagination

Add pagination to forum user profile
Re-add mutiple choice advanced options
Merge pull request #3459 from edx/sylvia/docs/multiple_choice

Re-add mutiple choice advanced options
HTML Editor Changes - Raw Editor

stud-1566
edits
edits
edits from lou
frances edits
image update
Andy's comments addressed