#139 Configure differed colours to indicate watchlist values

[Louie]

In the Stock Watchlist window you can set a "Fall Below" and "Rise Above" value for stocks being watched. However you are only able to set one colour to highlite which stocks have fallen below or risen above their monitored stock values.

It would make it easier to see the overall picture if it were possible to configure a different colour to indicate which stocks have fallen below their "Fall Below" value and which stocks have risen above their "Rise Above" value.