Remember the user last thread sort preference
FOR-545
Merge pull request #3738 from mlkwaqas/waqas/for545-user-last-thread-not-remembered

Waqas/for545 user last thread not remembered
Remove Flash Test Scenarios
Set position for collapsible.js full-bottom link.

Currently it is covering the whole parent div.

LMS-2852
Fixes: DOC-599
Merge pull request #4142 from edx/ahodges/documentation/DOC599

Fixes: DOC-599
Add info about Mandarin Chinese option to LMS
Merge pull request #4149 from edx/sylvia/docs/release_notes_6_16

Add info about Mandarin Chinese option to LMS
Tracks last edited date and user, and adds has_changes for blocks.
link to code ownership page from CONTRIBUTING.rst file
Merge pull request #4152 from edx/db/code-ownership

link to code ownership page from CONTRIBUTING.rst file
Wait for scripts defined in common xmodule code to execute.

STUD-1792
Merge pull request #4060 from edx/benmcmorran/edit-tracking

Tracks last edited date and user, and adds has_changes for blocks
Remove locator.py (now sourced from the external opaque_keys library)

[LMS-2757]
Merge pull request #4113 from cpennington/remove-locator

Remove locator.py (now sourced from the external opaque_keys library)
Removes DateTuple field type
Merge pull request #4119 from edx/christina/requirejs-promise

Wait for scripts defined in common xmodule code to execute.
deprecating i18n tasks from rake to paver
Update i18n.rst for rake to paver transition
Merge pull request #4148 from edx/usman/lms2852-code-problems-output

Set position for collapsible.js full-bottom link.