display default error message for non-json responses (TNL-5818)

[studio] log ajax errors. (TNL-5818)

[studio] fix failing test (TNL-5818)

[cms-test] avoid circular error logging; stub Logger (TNL-5818)

[cms-test] fix logger dep in squire config (TNL-5818)

[cms-tests] fix logger import (TNL-5818)

[cms-test] stub the logger directly in the karma config. (TNL-5818)

[studio] didn't need Logger after all (TNL-5818)

[studio] ignore console.log (TNL-5818)

ECOM-6396

TNL-5899

This reverts commit d39f7197.

TNL-5281

TNL-5582

* Updated the SASS to point to the Pattern Library
* Removed duplicate copies of fonts

This adds ability to refresh the list of uploaded videos without refreshing the whole page.

Added a refresh button that when clicked:
- fetches a fresh list of uploaded files from the server
- updates `PreviousVideoUploadListView`
- removes the successfully completed uploads from `ActiveVideoUploadListView`
- retains the ongoing or failed uploads in `ActiveVideoUploadListView` so that they can be monitored/retried

The view can also be refreshed without user action, but I felt it may be less surprising to have a button instead.

MA-333 update: auto-refresh list, fix test failure

Changes:
1. Refresh of file list triggered by upload completion. Refresh button retained and label changed to "Refresh List".
2. Added `aria-live="polite"` to `.active-video-upload-list` and `.assets-table`.
3. Removed unused parameter `evt`.
4. Added self to the `AUTHORS` file.

MA-333 update: added tests

MA-333 update: removed refresh button

MA-333 update: address review comments of @mushtaqak

MA-333 update: simplify nested `_each`

MA-333 update: rename viewRefresh to isViewRefresh

MA-333 update: doc string for `clearSuccesful`

MA-333 update: fix accessibility

MA-333 update: update only successfully uploaded videos

MA-333 update: use window.SR feature to notify screen readers that video upload was successful (@pomegranited)

moment-timezone require config

jasmine test fix, duplicate req. cleanup

TNL-4877