Unify TGUI crew manifest across lobby and ghosts, make it a true table (#16436)

code/modules/mob/dead/observer/observer.dm

@@ -703,11 +703,8 @@ This is the proc mobs get to turn into a ghost. Forked from ghostize due to comp
 	set name = "Show Crew Manifest"
 	set category = "Ghost"
 
-	var/dat
-	dat += "<h4>Crew Manifest</h4>"
-	dat += data_core.get_manifest()
-
-	src << browse(dat, "window=manifest;size=370x420;can_close=1")
+	var/datum/tgui_module/crew_manifest/self_deleting/S = new(src)
+	S.tgui_interact(src)
 
 //This is called when a ghost is drag clicked to something.
 /mob/observer/dead/MouseDrop(atom/over)

code/modules/mob/new_player/new_player.dm

@@ -658,13 +658,8 @@
 	return new_character
 
 /mob/new_player/proc/ViewManifest()
-	var/dat = "<div align='center'>"
-	dat += data_core.get_manifest(OOC = 1)
-
-	//src << browse(dat, "window=manifest;size=370x420;can_close=1")
-	var/datum/browser/popup = new(src, "Crew Manifest", "Crew Manifest", 370, 420, src)
-	popup.set_content(dat)
-	popup.open()
+	var/datum/tgui_module/crew_manifest/self_deleting/S = new(src)
+	S.tgui_interact(src)
 
 /mob/new_player/Move()
 	return 0