Support foreground (and background) property for MultiSelectDropdown

[luxint]

Hi,

I noticed that i can set the background property (in code) of MultiSelectDropdown and then the background is set of the cell in the datagrid of which it is part of, however this doesn't work for the foreground property and when clicked both background and foreground color are white&black. Would be great if we could set these properties like the standard dropdown component.