Add tests for:

- extractDesign util
- onDesignQueryResult (pages/design/index.vue)
- onQueryError (pages/design/index.vue)

Previously, when opening Design View, if the design
did not exist (i.e. bad url, wrong version) we
would not handle this case and the loading
spinner would endlessly display.

This commit adds better guards to extractDesign()
util to prevent an exception being thrown in this case,
and handles it explicitly by redirecting user and using
createFlash.

In addition, a few full stops are added to error messages
for consistency.

Sorting issues by label priority in graphQL

See merge request gitlab-org/gitlab!27936

- support both desc and asc

Update Feature proposal.md with UX goal

See merge request gitlab-org/gitlab!30648

Add tier badges to Rake task topics

Closes #207893

See merge request gitlab-org/gitlab!30586

Re-write end-to-end quick start guide

See merge request gitlab-org/gitlab!28619

Add raw_blob_request_limit to Application Settings API

Closes #215308

See merge request gitlab-org/gitlab!30211

Make wording and tutorial more terse
Rename quick_start_guide to beginners_guide
Update beginners_guide title
Update quick_start_guide ref links
Apply suggestions to beginners_guide.md
Implement review items
Reduce filesize of image
Fix broken anchor

Fixes any links to renamed sections

Add provision for merge request

See merge request gitlab-org/gitlab!30662

Updated API docs of group_milestones

See merge request gitlab-org/gitlab!30441

More cleanup for YAML reference doc

See merge request gitlab-org/gitlab!30571

Cleaning out all issues flagged by Vale

Move some IDE specs to Jest

See merge request gitlab-org/gitlab!30398

Update  secure integration docs

See merge request gitlab-org/gitlab!30290

Fix 500 error for non-existing snippet on graphql mutations

See merge request gitlab-org/gitlab!30632

Apply suggestion to spec/support/shared_examples/requests/api/graphql/mutations/snippets_shared_examples.rb

- Also adds a shared WebWorkerMock
- Moves nav_dropdown_spec to VTU

Moved environments_folder_view_mixin out of ee

See merge request gitlab-org/gitlab!29984

Handle a partially-updated RemoteMirror

See merge request gitlab-org/gitlab!29082

Fix broken link

Closes #215208

See merge request gitlab-org/gitlab!30271

Add Snippet repository backfiling background migration

See merge request gitlab-org/gitlab!29927

Consolidate the two methods of docs redirect

See merge request gitlab-org/gitlab!30613

Add provisioning to app steps for Okta SCIM

See merge request gitlab-org/gitlab!30646

Move tests from Karma to Jest

See merge request gitlab-org/gitlab!30500

Fixes clipboard_button copy tooltip overlapping

See merge request gitlab-org/gitlab!30622

Remove email restrictions feature flag

See merge request gitlab-org/gitlab!30548

Ignore nil labels with issuable creation

Closes #215936

See merge request gitlab-org/gitlab!30566

Add the ToastUI editor dependency

See merge request gitlab-org/gitlab!30060

Added the toastui WYSIWYG editor to the frontend

Docs: fix capitalization

Closes #215958

See merge request gitlab-org/gitlab!30640

Capitalization in the documentation should match what the user
sees in the user interface.

Backfill environment_id on deployment_merge_requests

See merge request gitlab-org/gitlab!27219