Improve desktop icon quality and generation #1155

Job	Run time
build-docker (macos)	45s
build-desktop (macos, development)	1m 18s
build-docker (ubuntu)	1m 57s
build-desktop (macos, production)	1m 3s
build-desktop (ubuntu, development)	1m 3s
build-desktop (ubuntu, production)	54s
build-web (macos, development)	54s
build-web (macos, production)	55s
build-desktop (windows, development)	3m 26s
build-web (macos, test)	53s
build-desktop (windows, production)	5m 35s
build-web (ubuntu, development)	1m 3s
build-web (ubuntu, production)	1m 10s
build-web (ubuntu, test)	1m 10s
build-web (windows, development)	3m 46s
build-web (windows, production)	5m 2s
build-web (windows, test)	2m 38s
	33m 32s

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