LPS-37696 Set it to active=false by default instead of setting it to include=false

The main benefit of this is that it's much easier to reenable it if needed.

This also solves LPS-38163
LPS-37696 Explain that the portlet is deprecated in the description.
LPS-37696 Upgrade process to disable the Web Content List portlet for all companies
LPS-38185 When a portlet is inactive it should only be shown in the page to administrators
LPS-38185 Add a more explanatory message when a portlet is not active
LPS-38186 Portlets that don't use the default template are not being shown when inactive
LPS-37696 Simplify
LPS-37696 Grammar
LPS-38186 LPS-37696 Lang keys