Local parent directory was showing random size

Caused by bfe5b292

Source commit: 61b8b15d665df446c52ce18569e7471d371d0c63

source/packages/filemng/DirView.pas

@@ -1106,6 +1106,7 @@ begin
     IsRecycleBin := False;
     IsParentDir := True;
     Size := -1;
+    CalculatedSize := -1;
 
     Item.Caption := '..';