Added app/Common.php

[jason-napolitano]

A commit that will hopefully help with this topic: #2101. This is a re-submit due to lack of GPG signing in the previous PR: #2105

Each pull request should address a single issue, and have a meaningful title.

Description
Explain what you have changed, and why.

Checklist:

• Securely signed commits
• Component(s) with PHPdocs
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide

---------Remove from here down in your description----------

Notes

• Pull requests must be in English
• If the PR solves an issue, reference it with a suitable verb and the issue number
  (e.g. fixes 12345
• Unsolicited PRs will be considered, but there is no guarantee of acceptance
• Pull requests should be from a feature branch in the contributor's fork of the repository
  to the develop branch of the project repository

[MGatner]

Looks pretty good. Typo on first comment: “Te goal”. Also still need the bracket line break:

if ...
{

This will definitely need User Guide updates, probably in the Extending section, but I can work on that since you said you were unfamiliar with the doc format (if the admins are willing to approve without it).

[MGatner]

@jason-napolitano Can we get that typo fixed, and the newlines for brackets?

@lonnieezell Do you approve of this approach? I can update docs for it if so.

[lonnieezell]

@MGatner Yes, I approve. We had discussed this previously and then it got lost in the shuffle of me moving.

[MGatner]

Okay got the docs in on another PR. @jason-napolitano I would still like to see some attention to the issues above. If you can't get to it we can either fix it after the fact or start a new PR.

[lonnieezell]

I get the feeling @jason-napolitano is not going to be able to get this one. Will have to update myself manually. Not sure I have the time tonight to do that, but we'll see.