Add a Science category to the menu. (#12215) #946

Job	Run time
build / build (lmde6, linuxmintd/lmde6-amd64, LMDE 6, false) / LMDE 6	3m 41s
build / build (mint22, linuxmintd/mint22-amd64, Mint 22, true) / Mint 22	3m 59s
	7m 40s

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