There's a bounty for this right? i spent nearly two full days at this

code/datums/elements/flavor_text.dm

@@ -112,7 +112,7 @@ GLOBAL_LIST_EMPTY(mobs_with_editable_flavor_text) //et tu, hacky code
 		var/datum/element/flavor_text/F = i
 		choices[F.flavor_name] = F
 
-	var/chosen = input(src, "Which flavor text would you like to modify?") as null|anything in choices
+	var/chosen = tgui_input_list(src, "Which flavor text would you like to modify?", "", choices)
 	if(!chosen)
 		return
 	var/datum/element/flavor_text/F = choices[chosen]

code/datums/elements/polychromic.dm

@@ -122,7 +122,7 @@
 			overlays += mutable_appearance(f_icon, overlays_states[i], color = M.color)
 
 /datum/element/polychromic/proc/set_color(atom/source, mob/user)
-	var/choice = input(user,"Polychromic options", "Recolor [source]") as null|anything in overlays_names
+	var/choice = tgui_input_list(user,"Polychromic options", "Recolor [source]", overlays_names)
 	if(!choice || QDELETED(source) || !user.canUseTopic(source, BE_CLOSE, NO_DEXTERY))
 		return
 	var/index = overlays_names.Find(choice)