Set position for collapsible.js full-bottom link.

Currently it is covering the whole parent div.

LMS-2852
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.
Merge pull request #4148 from edx/usman/lms2852-code-problems-output

Set position for collapsible.js full-bottom link.
Merge pull request #4154 from edx/benmcmorran/remove-datetuple

Removes DateTuple field type
Merge pull request #4157 from edx/release

Release
Fix variable names to give context for translators

fix other various i18n issues
Merge pull request #4156 from edx/sarina/fix-i18n-bugs

Fix variable names to give context for translators
Do not print exception message below stacktrace
adding Tim Babych to AUTHORS