Convert botany + ranching manuals to use DMIcon (+ related code cleanup) #14948

Job	Run time
Start Gate	1s
Run Linters	2m 28s
Collect data for other tasks	14s
Compile Maps	2m 40s
Windows Build	2m 2s
Integration Tests (blueshift) / run_integration_tests	18m 35s
Integration Tests (deltastation) / run_integration_tests	19m 0s
Integration Tests (graveyard) / run_integration_tests	18m 41s
Integration Tests (icebox) / run_integration_tests	19m 14s
Integration Tests (kilostation) / run_integration_tests	13m 48s
Integration Tests (metastation) / run_integration_tests	13m 56s
Integration Tests (boxstation) / run_integration_tests	14m 2s
Integration Tests (multiz_debug) / run_integration_tests	14m 21s
Integration Tests (runtimestation) / run_integration_tests	18m 36s
Integration Tests (ouroboros) / run_integration_tests	14m 19s
Integration Tests (theseus) / run_integration_tests	14m 11s
Integration Tests (tramstation) / run_integration_tests	14m 18s
Integration Tests (voidraptor) / run_integration_tests	13m 54s
Alternate Tests (515, 1627, runtimestation) / run_integration_tests	13m 50s
Compare Screenshot Tests	14s
Completion Gate	1s
	3h 48m 25s

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