Request: Support SuggestedValuesAttribute

[JamesBalisciano]

Currently, it does not appear that SuggestedValuesAttribute is supported in the manner expected.

Steps to reproduce:

1. Create a new Instrument class definied as:

[Display("MyInstrument")]
public class MyInstrument : Instrument
{
    [Display("My String")]
    [SuggestedValues(nameof(Values))]
    public string MySetting { get; set; }

    public string[] Values => new[] { "One", "Two", "Three" };

    public MyInstrument()
    {
        Name = "My Instrument";
        MySetting = string.Empty;
    }
}

2. In the Editor, this works as expected. An editable combo box allows manual entry or selection from the suggested array.
3. In TUI, only manual entry seems to be allowed.