* each module have own list of implementations
* deleted placeholder .ui files from Calc and Impress

Change-Id: Ib7d4cafbb332447e769ca753003d31e9f3025f0a
Reviewed-on: https://gerrit.libreoffice.org/29143Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>