* master: (21 commits)
  Move `Group -> Members` to top-level, fix missing sub-nav for Subgroups
  Left align logo; increase max width of title
  Add newline to end of frontend.md.
  Clone nested objects from default data. Checks if key is present before accessing it
  Update CHANGELOG.md for 8.17.1
  Document use of AirBnb js styleguide and eslint.
  Don't allow a project to be shared with an ancestor of the group it is in
  Fix access to projects shared with a nested group
  Ignore builds dir when run rubocop check
  Remove hidden-xs classes from last columns in environments and pipelines table. Transform pipelines table css to match structure of pipelines table Make environments table overflow
  Use exceptions for MergeService error handling
  Clarify when to create EE compatibility MR in code review process
  New runner API returns 204
  Backport new behavior to CI API
  Backport API to V3
  Update documentation
  Return 204 for delete endpoints
  API project create: Make name or path required
  Only create unmergeable todos once
  Put back the new project button
  ...

Fix Cycle Analytics -> Plan is loading forever

Closes #27622

See merge request !9577

Move `Group -> Members` to top-level, fix missing sub-nav for Subgroups

Closes #28678

See merge request !9589

Left align logo; increase max width of title

Closes #27934

See merge request !9588

Fix CI tables action buttons are hidden is smaller screens

Closes #28661

See merge request !9578

Document use of AirBnb js styleguide and eslint.

See merge request !9558

Fix 'New Tag' layout on Tags page

See merge request !9176

API project create: Make name or path required

Closes #6073

See merge request !9416

Checks if key is present before accessing it

Fix broken test

[ci skip]

Don't allow a project to be shared with an ancestor of the group it is in

Closes #28788

See merge request !9566

Put back the new project button

Closes #27354

See merge request !9426

Fix access to projects shared with a nested group

Closes #28787

See merge request !9565

Ignore builds dir when run rubocop check

See merge request !9580

Merge branch '28769-raise-custom-exception-in-all-methods-of-mergeservice-that-want-to-inform-the-user' into 'master'

Use exceptions for MergeService error handling

Closes #28769

See merge request !9576

Return 204 on all DELETE endpoints

Closes #20429

See merge request !9397

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Transform pipelines table css to match structure of pipelines table
Make environments table overflow

If any method called by `MergeService#execute` raises a `MergeError`,
that error's message will be logged, the model will be updated, and the
merge will fail.

Clarify when to create EE compatibility MR in code review process

See merge request !9575

Only create unmergeable todos once

Closes #28555

See merge request !9513

* master:
  Fix migration without DOWNTIME clause specified
  Fix CSS classes
  fix missing @ symbol
  Update CHANGELOG.md for 8.16.7
  Update CHANGELOG.md for 8.16.7
  Update CHANGELOG.md for 8.16.7
  Make RuboCop happy
  Add development fixtures for nested groups
  Align last column buttons with new environment button
  Removed jQuery UI draggable
  ensure webpack dev server proxy connects regardless of request headers
  Keep consistent in handling indexOf results
  Replace setInterval with setTimeout to prevent highly frequent requests
  Add feature specs for three types of user uploads
  Minor refactoring of Uploaders
  Fix #27840 - Improve the search bar experience on mobile
  Fix false positive caused by non-interpolated string use
  Fix inline comment images by removing wrapper #20890

Fix migration without DOWNTIME clause specified

See merge request !9571

Make RuboCop happy

See merge request !9554

Add button to create issue for failing build

Closes #25920

See merge request !9391

Fix inline comment images by removing wrapper #20890

Closes #20890

See merge request !5804