Renders a form group with a <select> control within an EditForm for selecting a value from a dropdown.
<BsDropdown @bind-Value="@model.CostRegion" Label="Cost region" ValueOptions="@model.GetCostRegions()" />The BsDropdown control requires a ValueOptions property to be set which
lists the possible values to display. This should be a Dictionary<TType, string>
where TType is the bound type and the string is the displayed.
If you wish to show a dropdown bound to an enum value use the
<BsDropdownEnum>
component.