This reverts commit cb10b725c8929b8b4460f89c9d96c773af39ba6b.

This reverts commit cb10b725c8929b8b4460f89c9d96c773af39ba6b.

Apply the same spam checks to public snippets (either personal snippets
that are public, or public snippets on public projects) as to issues on
public projects.

Apply the same spam checks to public snippets (either personal snippets
that are public, or public snippets on public projects) as to issues on
public projects.

And Snippets get awards

## What does this MR do?

Makes snippets more awesome, by making them awardables

## Why was this MR needed?

Because Snippets were left behind.

## What are the relevant issue numbers?

Closes #17878

See merge request !4456

This reverts commit 3e991230.

# Conflicts:
#	app/models/project.rb

Improve personal snippet access workflow.

Replaces !1709

Fixes #3258

See merge request !1817

- Split up SnippetsController into separate dashboard and explore sections.
- Use consistent page titles, header titles and sidebars between dashboard and explore sections when signed in or not.

* projects from explore page are available from dashboard
* use dashboard sidebar for both logged in and not users
* move explroe projects under projects tab
* move explore groups under groups tab
* move public snippets under snippets tab
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

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

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

write_ was renamed to create_
modify_  was renamed to update_

So now in update action we have next code

def create
  can?(current_user, :create_issue, @issue)
end

def update
  can?(current_user, :update_issue, @issue)
end
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Jeroen van Baarsen <jeroenvanbaarsen@gmail.com>

Add new service classes to create and update project and personal
snippets.  These classes are responsible for enforcing restricted
visibility settings for non-admin users.