Add a zoom link added / removed system note when a zoom link is being
added / removed to the issue description.

Task list updates should not mark users action as spam on akismet.

to support manual sorting on the frontend

There are no namespaces in the strings so we don't need those

- Externalize strings in milestones_helper
- Externalize strings in app/services
- Update PO file

Backports https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/10161
(code out of ee/ folder).

Add project when creating milestone in specs

We validate milestone is from the same
project/parent group as issuable ->
we need to set project in specs correctly

Improve methods names and specs organization

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

and some additional refactoring

Load whole file in memory to simplify code

Also refactored cleanup view to use the same localized string

Process CSV uploads async using a worker then email results

Fix leaking information of confidential issues on TODOs
when user is downgraded to guest access.

With this quick action the user can create a new MR starting from
the current issue using as `source_branch` the given `branch name` and
as `target_branch` the project default branch. If the `branch name` is
omitted a name is automatically created starting from the issue title.

Extract code to make it easier reusable
- introduce AttributesRewriter and ContentRewriter
  - support group entites when rewriting content
- make Uploader copy_to working for Namespaces

Moves the related_branches method from Issue model
to RelatedBranchesService

This whitelists all existing offenses for the various CodeReuse cops, of
which most are triggered by the CodeReuse/ActiveRecord cop.

In rails 5, the attributes method for an enum returns the name
instead of the database integer.

As we always call both methods from the controller - and elsewhere we call the
more general method - and one uses all notes and the other uses system notes,
then we should just load the notes and their authors once, and filter on the
Ruby side.