External Meeting Response URL

[tfreier]

This is a new feature that allows users to define a custom URL that users who click on a response link within a meeting invitation get redirected to instead of seeing the standard meeting response page.

This PR is a copy of #1801 which I had created for the wrong branch)

Description

If the user defines a meeting response URL under Admin > AOP Settings. The meeting response page will forward to the set URL instead of displaying the standard meeting response page. If there is no URL set nothing change. Therefore this will only affect users that actively provide a value. In addition, it will append some variables to the URL to allow the response page to display some details about the meeting.

Motivation and Context

When SuiteCRM sends out meeting invitations the user is supposed to use the links to accept or decline the invitation. So far the response page has been very simple and there was no way to customize it either. In addition, it displayed a link to the meeting record in sugar which customers usually can't access. In my case, this kept me from using the meetings module altogether.

How To Test This

1. Go under Admin > AOP Settings and set a Meeting Response URL
2. Create a new meeting and send our invites.
3. Click on one of the response links in the invitation email

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Final checklist

• My code follows the code style of this project found here.
• My change requires a change to the documentation.
• I have read the How to Contribute guidelines.

[Mac-Rae]

Please rebase this pull request onto hotfix-7.10.x as the hotfix branch is now specifically for 7.11.x issues.

Please take a look at our contribution guidelines for more information.

[SuiteBot]

All committers have signed the CLA.

[horus68]

Self note on language changes
@Dillon-Brown