Rename method to fallback_message in SlashCommands for readability

Replace @resource with resource in SlashCommands modules
for consistency reasons

It reduces duplication of a Slack response message structure
by extracting "attachments" definition into a base class.

Add a rubocop rule to put new project routes under /-/

Closes #29130

See merge request gitlab-org/gitlab!20460

Ensure that new routes are added to /-/ scope
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Bump selenium-webdriver to 3.142

See merge request gitlab-org/gitlab!20829

Replace board service in board list common spec.js

See merge request gitlab-org/gitlab!20872

Update Docker version in gitlab:assets:compile

See merge request gitlab-org/gitlab!20911

Use upstream Peek again

Closes #13996

See merge request gitlab-org/gitlab!20917

Replace board service in assignee select spec.js

See merge request gitlab-org/gitlab!20880

Update fork network relations upon project visibility decrease

See merge request gitlab-org/gitlab!20466

Replace board service in board new issue spec.js

See merge request gitlab-org/gitlab!20874

Add new filters to SnippetsFinder

See merge request gitlab-org/gitlab!20767

The new filters are:
- Filter by id
- Allow author to be an id and not only an object
- Allow project to be an id and not only an object
- Allow filtering only PersonalSnippet
- Allow filtering only ProjectSnippet

Add Maven commands to package detail page

Closes #7603

See merge request gitlab-org/gitlab!20300

Create new Maven installation component
Rename npm installation component
Add support to code block for multiline
Add components to top level app
Add tests for new components
Update tests for existing
Added changelog entry
Removed unused package url
Added setup instructions to Maven component
Added rails helper for package urls
Updated tests

Project Import: Fail gracefully & record failures

See merge request gitlab-org/gitlab!20727

 - Add feature flag import_graceful_failures
 - Add feature flag to group instead of project
 - Add import_failures table
 - Gracefully fail, and log error
 - Send error to Sentry

Remove duplicate queries object and move it to dashboard panels object

See merge request gitlab-org/gitlab!20621

Migrate vue shared specs to Jest + VTU

See merge request gitlab-org/gitlab!20802

Migrated a few Karma specs to Jest and Vue Test Utils, which will help
us with the ongoing BootstrapVue upgrade.

Refactor snippet route helpers

See merge request gitlab-org/gitlab!20478

Peek 1.1.0 contains the change that we had in our gitlab-peek gem, as
well as only saving when the request ID is present.

Accept user-defined dashboard uids in Grafana embeds

See merge request gitlab-org/gitlab!20486

Link Git debug trace vars in git debug docs

See merge request gitlab-org/gitlab!20808

Link upstream docs with all Git debug traces & env variables

Bump stackprof to 0.2.13

Closes #37499

See merge request gitlab-org/gitlab!20907

In several places of the code we have conditions to check
whether the snippet is a `PersonalSnippet` or a `ProjectSnippet`.
In this commit we overwrite existing named routes helpers to
avoid that redundancy and in preparation for secret snippets,
where we will have to automatically add a query string param
to every personal snippet route.

Enable ETag caching for merge request notes polling

See merge request gitlab-org/gitlab!20440

We also invalidate the cache when a note on a commit
that is part of the MR is updated.

This adds support for generating `d3` flamegraphs

Adds missing state prop to log.vue

Closes #35222, #36625, and #37313

See merge request gitlab-org/gitlab!20772

Disable changelog check on docs-only MRs

Closes #37340

See merge request gitlab-org/gitlab!20729