change edited post "hidden user" to be null and translate in post

migrations/1.0.0.js

@@ -1,6 +1,14 @@
 'use strict';
 
 module.exports = async(db, redis) => {
+	console.log('Updating edited posts username property for "hidden users" to support localisation');
+	await db.collection('posts').updateMany({
+		'edited.username': 'Hidden User',
+	}, {
+		'$set': {
+			'edited.username': null,
+		},
+	});	
 	console.log('Updating db for language settings');
 	await db.collection('globalsettings').updateOne({ _id: 'globalsettings' }, {
 		'$set': {

views/mixins/post.pug

@@ -155,7 +155,7 @@ mixin post(post, truncate, manage=false, globalmanage=false, ban=false, overboar
 				small.cb.mt-5.ml-5.edited
 					| Last edited 
 					time.reltime(datetime=postEditDate.toISOString()) #{postEditDate.toLocaleString(undefined, { hourCycle:'h23' })}
-					|  by #{post.edited.username}
+					|  by #{post.edited.username || __('Hidden User')}
 			if post.banmessage
 				p.ban
 					span.message USER WAS BANNED FOR THIS POST