Customizable Cycle Analytics - Add stage button

Closes #13076

See merge request gitlab-org/gitlab-ee!15122

Added new button to launch the new
stage form for customisable cycle
analytics.

Move add stage button to vue component

Added basic test for add stage button

Move css to bootstrap classes

Removes scss styling that can be applied
via bootstrap classes and adds the relevant
classes to html elements

Added feature tests for add stage button

Moved add stage functionality to ee mixin

Created addStageMixin for the add stage
functionality needed in EE. Added a stub
mixin to the CE dir.

Merge branch '10536-add-license-information-to-the-dependency-list-based-on-current-license-rules' into 'master'

Add License information to the Dependency List

See merge request gitlab-org/gitlab-ee!14905

Remove vue-resource from related-issues

See merge request gitlab-org/gitlab-ee!16057

Addresses https://gitlab.com/gitlab-org/gitlab-ee/issues/14024

Danger: Allow fixup commits if squash enabled or MR is WIP

See merge request gitlab-org/gitlab-ce!32210

Remove allowing extra 2 lines since prepend_if_ee

See merge request gitlab-org/gitlab-ee!16377

Since we can just use `prepend_if_ee` now we shouldn't allow any
difference. We should just add them to CE.

Docs update jaeger url

See merge request gitlab-org/gitlab-ce!32640

Combine asset proxying content from Omnibus

See merge request gitlab-org/gitlab-ce!32807

Check current user is nil when serialising

See merge request gitlab-org/gitlab-ee!16346

Avoid filling target branch when unknown and source is default branch

Closes #62807

See merge request gitlab-org/gitlab-ce!32701

Merge branch 'reprazent/gitlab-ce-bvl-find-correct-variables-for-testing-translations' into 'master'

Build correct variables for testing translations

Closes #48110

See merge request gitlab-org/gitlab-ce!32871

Start of fix for #21859, allow users to open files with newlines in the filenames.

Closes #21859

See merge request gitlab-org/gitlab-ce!32820

Eagerly load Issue-Epic-association

Closes #14738

See merge request gitlab-org/gitlab-ee!15886

Simplify specs for Project#disabled_services

See merge request gitlab-org/gitlab-ee!16326

Add index on group_id column concurrently

See merge request gitlab-org/gitlab-ce!32826

This fixes previously added migration which caused timeouts on
big events table.

This makes sure we build the correct variables for testing
translations.

When translating, we could be specifying the variables in different
forms for each id:

- In the singular we could be using a `%{hash}` interpolation
- In the plural we could be using a `%d` interpolation

This changes the tests to accommodate for that: We now use the
variables used in the relevant translation id as the source for the
variables we mix in in specs.

In case the source and the target project are the same, the
source branch is the default branch, and the target branch
is not present, we will avoid prefilling the target branch
with the repository default branch. Letting the user decide.

Add EE label to repository_storage

See merge request gitlab-org/gitlab-ce!31933

Start linting for unneeded dollar signs

See merge request gitlab-org/gitlab-ce!32803

Do not use dollar signs in shell codeblocks when
no output is shown