Science Analysis Fixes (#19562)

Fixes the compound microscope's sprite disappearing when slides are
added, and the centrifuge & spectrophotometer sprites disappearing while
working.

code/game/objects/items/science_sampler.dm

@@ -195,7 +195,7 @@
 
 	to_chat(user, SPAN_NOTICE("\The [src] begins to spin, separating the contents of the samples."))
 
-	icon_state = "[initial(icon_state)]_working"
+	icon_state = "centrifuge_working"
 	addtimer(CALLBACK(src, PROC_REF(process_samples)), 30 SECONDS)
 
 /obj/machinery/centrifuge/proc/process_samples()
@@ -326,7 +326,7 @@
 
 	to_chat(user, SPAN_NOTICE("\The [src] begins to glow, shining light through its sample."))
 
-	icon_state = "[initial(icon_state)]_working"
+	icon_state = "spectrophotometer_working"
 	addtimer(CALLBACK(src, PROC_REF(process_sample)), 15 SECONDS)
 
 /**

html/changelogs/analysis-fixes.yml

@@ -0,0 +1,6 @@
+author: Sparky_hotdog
+
+delete-after: True
+
+changes:
+  - bugfix: "Fixed compound microscope, centrifuge and spectrophotometer sprites disappearing during use."