1. No string concatenation should be used in the gettext function.
2. Some extra parentheses should be used in coffee script, to avoid the following situation: in coffee script, the call ```gettext "text to be extracted" + "text should not be extracted"``` will be translated into ```gettext("text to be extracted" + "text should not be extracted")``` rather than ```gettext("text to be extracted") + "text should not be extracted"```.

Mobile/profile default privacy MA-1580

Update date summary blocks.

Clytwynec/custom a11y rules part2

Adds UTC time to the "Today's Date" block, and a fuzzy/relative
timestamp to all other displayed dates.

ECOM-2807

Fix flaky tests related to creative commons

html5 transcript exists

Course Blocks API

Course Blocks App MA-1556

Fixes for chrome automation:

Add response times to get_many/set_many/delete_many.

Update translations (autogenerated message)

Clytwynec/add paver test a11y

TNL-2800

adds an accessible label to the search input and the search button

Updated Zendesk error handling

Fix date summary blocks for courses without an end date.

MA-1044 DiscussionTopic - Added bulk operations

Remove legacy MITX_FEATURES reference

Properly logging exceptions so we have the complete stacktrace.

ECOM-2792