ext5migrate: replace calls to me.model.prototype.fields.each() and Ext.ModelMgr.create

on ExtJS4, me.model.prototype.fields is a config object
containing all the fields of the model, this object has properties like length, keys
on ExtJS 5, me.model.prototype.fields is an array of config object
that we have to iterate to get the field name

Ext.ModelMgr.create() is non-working in ExtJS5

www/manager5/data/DiffStore.js

@@ -35,15 +35,15 @@ Ext.define('PVE.data.DiffStore', {
 	    var olditem = me.getById(id);
 	    if (olditem) {
 		olditem.beginEdit();
-		me.model.prototype.fields.eachKey(function(field) {
-		    if (olditem.data[field] !== data[field]) {
-			olditem.set(field, data[field]);
+		Ext.Array.each(me.model.prototype.fields, function(field) {
+		    if (olditem.data[field.name] !== data[field.name]) {
+			olditem.set(field.name, data[field.name]);
 		    }
 		});
 		olditem.endEdit(true);
 		olditem.commit(); 
 	    } else {
-		var newrec = Ext.ModelMgr.create(data, me.model, id);
+		var newrec = Ext.create(me.model, data);
 		var pos = (me.appendAtStart && !first_load) ? 0 : me.data.length;
 		me.insert(pos, newrec);
 	    }
@@ -64,7 +64,7 @@ Ext.define('PVE.data.DiffStore', {
 		    me.remove(olditem);
 		}
 	    });
-		    
+
 	    rstore.each(function(item) {
 		cond_add_item(item.data, item.getId());
 	    });