porting healthbars from RS + mat fixes

code/modules/client/preference_setup/global/setting_datums.dm

@@ -330,6 +330,12 @@ var/list/_client_preferences_by_type
 	enabled_description = "On"
 	disabled_description = "Off"
 
+/datum/client_preference/vore_health_bars
+	description = "Vore Health Bars"
+	key = "VORE_HEALTH_BARS"
+	enabled_description = "Enabled"
+	disabled_description = "Disabled"
+
 /datum/client_preference/runechat_mob
 	description = "Runechat (Mobs)"
 	key = "RUNECHAT_MOB"

code/modules/client/preferences_toggle_procs.dm

@@ -489,6 +489,19 @@
 
 	feedback_add_details("admin_verb","TSubtleSounds")
 
+/client/verb/toggle_vore_health_bars()
+	set name = "Toggle Vore Health Bars"
+	set category = "Preferences"
+	set desc = "Toggle the display of vore related health bars"
+
+	var/pref_path = /datum/client_preference/vore_health_bars
+	toggle_preference(pref_path)
+	SScharacter_setup.queue_preferences_save(prefs)
+
+	to_chat(src, "Vore related health bars - [(is_preference_enabled(/datum/client_preference/vore_health_bars)) ? "Enabled" : "Disabled"]")
+
+	feedback_add_details("admin_verb","TVoreHealthBars")
+
 // Not attached to a pref datum because those are strict binary toggles
 /client/verb/toggle_examine_mode()
 	set name = "Toggle Examine Mode"