Fix flicker in the component list in design mode #16025

Job	Run time
python_test (ubuntu-22.04)	1m 37s
build_and_test (ubuntu-22.04, 1.73)	13m 17s
python_test (macos-12)	2m 0s
build_and_test (macos-12, stable)	27m 56s
python_test (windows-2022)	2m 41s
build_and_test (windows-2022, stable)	19m 46s
cpp_cmake (macos-12, 1.73)	17m 46s
build_and_test (windows-2022, 1.73)	20m 38s
cpp_test_driver (ubuntu-22.04)	6m 23s
cpp_cmake (windows-2022, nightly)	10m 3s
build_and_test (windows-2022, beta, --exclude ffmpeg --exclude gstreamer-player)	21m 29s
cpp_test_driver (macos-12)	5m 20s
ffi_32bit_build	57s
cpp_cmake (ubuntu-22.04, stable)	7m 14s
build_and_test (ubuntu-22.04, nightly)	9m 23s
cpp_test_driver (windows-2022)	8m 11s
mcu (pico-st7789, thumbv6m-none-eabi)	30s
mcu_esp	2m 37s
node_test (ubuntu-22.04)	3m 44s
mcu (stm32h735g, thumbv7em-none-eabihf)	42s
node_test (macos-12)	11m 2s
node_test (windows-2022)	12m 32s
android	2m 12s
esp-idf-quick	8m 50s
miri	50s
fmt_test	2m 2s
updater_test (0.3.0)	1m 42s
docs / docs	6m 30s
wasm / wasm	3m 53s
tree-sitter / tree-sitter-tests	8s
wasm_demo / wasm_demo	1m 33s
wasm / lint-slintpad	20s
wasm / build-slintpad	48s
cpp_package_test	2m 25s
	3h 57m 1s

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