Custom colors for buy/sell arrows don't show up in MT5 charts

[tonyramirez]

The buy and sell nodes have options for selecting the arrow colors displayed for buys and sells on the chart. These colors don't show up in MT5 when you run the expert.

It would be helpful to have this functioning because it would make it easier to distinguish arrows that open positions as opposed to closing them.

[l'andorrà]

@tonyramirez I support this request.