TYPO3 Core

When you add an extbase backend module and whant to use in the page context, the module name ist not determined correctly.

I think the problem here is, that the additional parameters e.g. id are not splittet from the module name in the "M" parameter. A solution would be to split everything befor the first ? in the M param and map the additional params to the module controller namespace or make them accessible in another way for the backend controller.

(issue imported from #M12390)