ext5migrate: set buttons property directly instead of calling applyIf

It seems that in ExtJS5 the prototype of the Window component already sets
some default values to me.buttons and me.layout, hence calling applyIf
on these properties will silently fail.

me.layout is already set to 'auto' by the framework, we don't need to set
that anymore.

www/manager5/window/Edit.js

@@ -232,13 +232,17 @@ Ext.define('PVE.window.Edit', {
 	    me.title = PVE.Utils.dialog_title(me.subject, me.create, me.isAdd);
 	}
 
+	if (me.create) {
+		me.buttons = [ submitBtn ] ;
+	} else {
+		me.buttons = [ submitBtn, resetBtn ];
+	}
+
 	Ext.applyIf(me, {
 	    modal: true,
-	    layout: 'auto',
 	    width: twoColumn ? colwidth*2 : colwidth,
 	    border: false,
 	    items: [ me.formPanel ],
-	    buttons: me.create ? [ submitBtn ] : [ submitBtn, resetBtn ]
 	});
 
 	me.callParent();