Some templates can't be overwritten anymore

[fzuerker]

Hello,

I noticed that with version 9 of this extension it is no longer possible to overwrite some of the fluid templates by specifying 'templateRootPaths' in typoscript.
This is due to hardcoded template paths in the controllers, which were introduced with this commit: 2bbd0e8
In our instance I fixed this by xclassing the controller and reverting back to the use of 'buildControllerContext'. It is deprecated and will be removed with TYPO3 v12 but I didn't know any other method.
Maybe someone knows a way to directly fix it in the controller, that will work with v12.