Secret Button to set everyone's mutant race

Mostly as a way to reverse the consequence of an badmin's lapse of good judgement (There's no easy way to reverse the Halloween event button.). This can also be used for an assortment of badminning.

code/modules/admin/admin.dm

@@ -435,6 +435,7 @@ var/global/floorIsLava = 0
 			<B>Fun Secrets</B><BR>
 			<BR>
 			<A href='?src=\ref[src];secretsfun=monkey'>Turn all humans into monkeys</A><BR>
+			<A href='?src=\ref[src];secretsfun=allspecies'>Change the species of all humans</A><BR>
 			<A href='?src=\ref[src];secretsfun=power'>Make all areas powered</A><BR>
 			<A href='?src=\ref[src];secretsfun=unpower'>Make all areas unpowered</A><BR>
 			<A href='?src=\ref[src];secretsfun=quickpower'>Power all SMES</A><BR>

code/modules/admin/topic.dm

@@ -1582,6 +1582,15 @@
 					spawn(0)
 						H.monkeyize()
 				ok = 1
+			if("allspecies")
+				var/result = input(usr, "Please choose a new species","Species") as null|anything in species_list
+				if(result)
+					log_admin("[key_name(usr)] turned all humans into [result]", 1)
+					message_admins("\blue [key_name_admin(usr)] turned all humans into [result]", 1)
+					for(var/mob/living/carbon/human/H in mob_list)
+						var/newtype = species_list[result]
+						H.dna.species = new newtype()
+						H.regenerate_icons()
 			if("corgi")
 				feedback_inc("admin_secrets_fun_used",1)
 				feedback_add_details("admin_secrets_fun_used","M")