Important: The backend layout is registered for every installation 

Description 

The backend layout of the page type this extension registers, and the descriptions of its content elements, were imported only by Configuration/Sets/AcademicProjects/page.tsconfig.

Configuration/page.tsconfig of an extension is auto-included for the whole installation since TYPO3 v12.0 (Feature: #96614); a site set is opt-in per site. So on a site that does not enable the set fgtclb/academic-projects the layout pagets__AcademicProject resolved nowhere: the page properties showed [ MISSING LABEL ] for it and it could not be selected for a new page at all.

Both imports moved to Configuration/page.tsconfig, where fgtclb/academic-programs already had them, and the copy in the site set was removed rather than left to be applied twice. The Configuration/TsConfig/page.tsconfig that carried nothing but a @todo asking for exactly this move was removed with it.

Impact 

The backend layout and the content element descriptions are available on every installation, whether or not it uses site sets.

Affected Installations 

All installations of this extension. Nothing has to be done: pages already carrying pagets__AcademicProject resolve the layout from now on.