Highlight board editor unplaced package list selection in schematic #78

Job	Run time
stylecheck	20s
build-opensuse (all)	5m 59s
build-debug	14m 55s
build-arch (all)	6m 21s
build-opensuse (horizon.so)	4m 58s
build (ubuntu:focal, g++, gcc, all)	15m 7s
build-arch (horizon.so)	4m 41s
build-pr-review	3m 52s
build (ubuntu:focal, g++, gcc, horizon.so)	4m 47s
build (ubuntu:jammy, g++, gcc, all)	12m 40s
build (ubuntu:jammy, g++, gcc, horizon.so)	4m 20s
build (ubuntu:noble, g++, gcc, all)	14m 52s
build (ubuntu:noble, g++, gcc, horizon.so)	4m 40s
build (debian:bullseye, g++, gcc, all)	13m 7s
build (debian:bullseye, g++, gcc, horizon.so)	4m 29s
build (debian:bookworm, clang, clang, all)	13m 53s
build (debian:bookworm, clang, clang, horizon.so)	4m 23s
build (debian:bookworm, g++, gcc, all)	15m 16s
build (debian:bookworm, g++, gcc, horizon.so)	5m 9s
	2h 33m 49s

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