Extend com_privacy to also trigger content plugins

[Ruud68]

Hi,
as a developer of several extensions and plugins I am currently busy integrating my extensions / plugins with the Core Joomla Privacy Tools suite.
What I noticed is that the triggered events like:

• onPrivacyExportRequest
• onPrivacyCollectAdminCapabilities
• onPrivacyCanRemoveData
• onPrivacyRemoveData
  are triggered for privacy (and system) plugins. The capabilities trigger is also triggered for other plugins like authentication, user, etc. but NOT for content plugins.

My idea is to extend the loading of plugins to not only privacy plugins, but also content plugins as these plugin can add functionality that stores / shares user / visitor data.
So if you have a content plugin that e.g. add Facebook like box, then you need to report that to the administrator (capability), If the plugin does some kind of tracking of user data, then you would also like to be able to report that (and remove) to the user when requested.

Actually this is an easy 'fix':

• Add PluginHelper::importPlugin('content'); on line 78 of ./administrator/components/com_privacy/src/Model/CapabilitiesModel.php
• do the same on line 98 of ./administrator/components/com_privacy/src/Model/ExportModel.php
• do the same on line 92 of ./administrator/components/com_privacy/src/Model/RemoveModel.php