umbrello doesn't start if some packages are missing, the following patch add the two required packages as RUN_DEPENDS
Index: Makefile =================================================================== RCS file: /cvs/ports/x11/kde-applications/umbrello/Makefile,v retrieving revision 1.3 diff -u -p -r1.3 Makefile --- Makefile 29 Jun 2018 22:16:26 -0000 1.3 +++ Makefile 6 Sep 2018 06:22:31 -0000 @@ -29,6 +29,8 @@ BUILD_DEPENDS = devel/gettext-tools \ RUN_DEPENDS = devel/kf5/kdoctools \ devel/kf5/kcrash \ + devel/kf5/kdelibs4support \ + devel/kf5/kunitconversion \ x11/gtk+3,-guic \ devel/desktop-file-utils \ math/graphviz