Updated webhooks UI

The webhooks files are in different places for EE & CE so this was missed when merging CE into EE.

## Group UI

![Screen_Shot_2016-05-17_at_10.05.39](/uploads/6e2942e478b574545b45989365307c24/Screen_Shot_2016-05-17_at_10.05.39.png)

## Project UI

![Screen_Shot_2016-05-17_at_10.06.08](/uploads/61380b40568bbc260932895be83d6bae/Screen_Shot_2016-05-17_at_10.06.08.png)

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/17525

See merge request !404

Add config for CI Runner that prevents it from picking untagged jobs

Closes #3456

See merge request !4039

Fix creation of Ci::Commit object which can lead to pending, failed in some scenarios

## What does this MR do?

If we use a new `project.ci_commits` it will add it to array, and some other services which can do a save on a project can lead to a scenario when `ci_commit` will be saved, where it should not be.

## What are the relevant issue numbers?

https://gitlab.com/gitlab-com/support-forum/issues/717 https://gitlab.com/gitlab-com/support-forum/issues/715 https://gitlab.com/gitlab-org/gitlab-ce/issues/17596 https://gitlab.com/gitlab-com/support-forum/issues/714 https://gitlab.com/gitlab-org/gitlab-ce/issues/13402

cc @rymai 


See merge request !4214

Move generator templates to generator_templates/



See merge request !4217

Warn admin if current active count exceeds license

Screenshot:

![image](/uploads/68b9d95f63ccb936f80414ecd63c07b3/image.png)

Closes #393

See merge request !401

Create a todo on failing MR build

Implements #14067. I worked on this with @DouweM (any mistakes are mine).

When a build fails for a commit, create a todo for the author of the merge request that commit is the HEAD of. If the commit isn't the HEAD commit of any MR, don't do anything. If there already is a todo for that user and MR, don't do anything.

Current limitations:
- This isn't configurable by project.
- The author of a merge request might not be the person who pushed the breaking commit.
- I haven't tested this with a working CI setup, just with the unit tests below and by modifying my DB directly.


See merge request !3177

Syntax-highlight diffs in push emails

![image](/uploads/8ecbabc65382214b8de63aae24f66cea/image.png)

Based on:
https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/151



See merge request !4147

Update 'after_script' introduction note

Related to gitlab-org/gitlab-ci-multi-runner#1321

See merge request !4205

Add pipeline view

This is continuation of https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/3653

cc @DouweM @grzesiek 

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/17551
Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/15625


See merge request !3703

Removed outdated comment from migration helpers

[ci skip]

See merge request !4213