private void buttonLevel2_Click(object sender, EventArgs e)
        {
            SymbolEntryWindow picker = new SymbolEntryWindow(false);

            picker.Show();
            picker.OnEntryComplete += TestingFunctions.CreateLevel2Form;
        }
        private void buttonAddSymbol_Click(object sender, EventArgs e)
        {
            SymbolEntryWindow picker = new SymbolEntryWindow(false);

            picker.Show();
            picker.OnEntryComplete += (InstrInfo inst) => AddSymbolSubscription(new InstrInfo[] { inst });
        }