This approach gives us two things:

1. Exact strings are verified, rather than more loosely checking for
   a substring
2. Should the string change in future, these tests no longer have to
   change. The purpose of them is to verify that some constant is
   returned, but they don't care what that constant actually contains.

Previously the `|| null` was ensuring that the return type of the helper
function was `HTMLElement | null`, rather than `HTMLElement | null
| undefined`, which allowed the tests to check against just `null`.
Instead of documenting that oddness, this just changes the tests to
expect an HTMLElement (or not), removing the need to avoid `undefined`.

Each dropdown now:

- stays open as items in it are checked/unchecked
- has a header and close button
- shows a search box when there are many items in it
- use a more specific name for the "All" filter; e.g., "All severities"

Truncate long tags in runners table

See merge request gitlab-org/gitlab-ce!26666

Move some EE-specific Karma tests to Jest

See merge request gitlab-org/gitlab-ee!10463

Add DAST as filter option in the Group Security Dashboard

Closes #8483

See merge request gitlab-org/gitlab-ee!10271

[CE] Reduce diff with EE in `spec/helpers`

Closes gitlab-ee#10143

See merge request gitlab-org/gitlab-ce!26706

[EE] Reduce diff with EE in `spec/helpers`

Closes #10143

See merge request gitlab-org/gitlab-ee!10477

Improve location fingerprint

See merge request gitlab-org/gitlab-ee!10487

Use colon as other parsers do
and move path to the first place
because it's the most important item

Signed-off-by: Rémy Coutable <remy@rymai.me>

Signed-off-by: Rémy Coutable <remy@rymai.me>

Signed-off-by: Rémy Coutable <remy@rymai.me>

Signed-off-by: Rémy Coutable <remy@rymai.me>

Signed-off-by: Rémy Coutable <remy@rymai.me>

Don't cutoff letters in MR and Issue links

See merge request gitlab-org/gitlab-ce!25910

Signed-off-by: Rémy Coutable <remy@rymai.me>

Signed-off-by: Rémy Coutable <remy@rymai.me>

Signed-off-by: Rémy Coutable <remy@rymai.me>

Signed-off-by: Rémy Coutable <remy@rymai.me>

Signed-off-by: Rémy Coutable <remy@rymai.me>

Signed-off-by: Rémy Coutable <remy@rymai.me>

Signed-off-by: Rémy Coutable <remy@rymai.me>

Update dependency @gitlab/svgs to ^1.55.0

See merge request gitlab-org/gitlab-ce!26664

# Conflicts:
#   package.json

Further refinement of introduction text

See merge request gitlab-org/gitlab-ee!10440

Remove redundant group name from environment name on the "Environments" page

Closes #24936

See merge request gitlab-org/gitlab-ce!25600