Targets defined with add_custom_target are not listed in search window using "cm" prefix

In the search field (CMD+K on Mac) can cmake targets be found and run. Targets created with add_executable and other real file targets are listed Targets defined with add_custom_target are not included there.

Please add also such custom_targets to the cmake target result list, since these targets are very usefull like "all" and "clean", if used e.g. to build multiple libs and executables of the project.