ui test improvs #27

Job	Run time
duplicates	4s
build (gcc-13.deb, --mini-tests)	5m 48s
build (gcc-13.deb, --std-tests)	5m 41s
build (gcc-13.deb, --test-libcore)	12m 36s
build (gcc-13.deb, --extended-rand-tests)	8m 4s
build (gcc-13.deb, --extended-regex-example-tests)	6m 27s
build (gcc-13.deb, --extended-regex-tests)	12m 9s
build_system	24s
build (gcc-13.deb, --test-successful-rustc --nb-parts 2 --current-part 0)	6m 33s
build (gcc-13.deb, --test-successful-rustc --nb-parts 2 --current-part 1)	7m 7s
build (gcc-13.deb, --projects)	16m 25s
build (gcc-13-without-int128.deb, --mini-tests)	5m 58s
build (gcc-13-without-int128.deb, --std-tests)	6m 5s
build (gcc-13-without-int128.deb, --test-libcore)	13m 44s
build (gcc-13-without-int128.deb, --extended-rand-tests)	8m 46s
build (gcc-13-without-int128.deb, --extended-regex-example-tests)	6m 28s
build (gcc-13-without-int128.deb, --extended-regex-tests)	12m 20s
build (gcc-13-without-int128.deb, --test-successful-rustc --nb-parts 2 --current-part 0)	7m 2s
build (gcc-13-without-int128.deb, --test-successful-rustc --nb-parts 2 --current-part 1)	7m 12s
build (gcc-13-without-int128.deb, --projects)	17m 32s
	2h 46m 25s

Provide feedback