Makes DNA swapping methods more reliable

- Makes heads keep hair on removal
- Amputated limbs from a DNA-injected individual now will keep their
  appearance of the DNA-injected person
- Wounds will now vanish on their own now
- Admins now have an "incarnate" option on the player panel when viewing
  ghosts for quick player instantiation
- Fixes a runtime regarding failing a limb reconnection surgery
- Copying a client's preferences now overrides the previous mob's DNA

code/modules/admin/admin.dm

@@ -139,6 +139,9 @@ var/global/nologevent = 0
 			else
 				body += "<A href='?_src_=holder;makeanimal=\ref[M]'>Animalize</A> | "
 
+			if(istype(M, /mob/dead/observer))
+				body += "<a href='?_src_=holder;incarn_ghost=\ref[M]'>Re-incarnate</a> | "
+
 			// DNA2 - Admin Hax
 			if(M.dna && iscarbon(M))
 				body += "<br><br>"