moduleoutput variable for Plesk removed in 8.3

[websavers]

When upgrading to 8.3 from 8.2.x, if you have customized templates and are using the Plesk module, you'll suddenly find the $moduleoutput variable outputs nothing at all. This is because the Plesk module has been updated to not use $moduleoutput to output HTML for the login button. The login action is now entirely part of the dynamically generated module actions menu. Similarly login actions with deep links within Plesk's panel (ex: to file manager, email accounts) are *only* part of the automatic/uneditable (in the template) $tplOverviewTabOutput variable.

For whatever reason this wasn't described anywhere (such as in the deprecation and removal notices) as a clear change that template developers should pay attention to.

FWIW, I'm not complaining about the changes, just that they weren't detailed as a major change to how module output is shown on the product details template.