What is necessary to get a RadGridView to focus the first cell of the row that is selected, when the SelectedItem is bound, when the grid is first shown? You can see in the screenshot that the first cell of the first row is focused even though the third row is selected via binding. You can also see the properties that are set for the grid below.
As soon as a user clicks on another row in the grid, the outlining / focus on the first cell goes away and moves to the first cell of the row the user selected.
<telerik:RadGridView
x:Name="fieldsGrid"
HorizontalAlignment="Stretch"
VerticalAlignment="Stretch"
IsReadOnly="True"
AutoGenerateColumns="False"
SelectionMode="Single"
SelectionUnit="FullRow"
EnableLostFocusSelectedState="False"
ShowGroupPanel="False"
ShowSearchPanel="False"
SearchPanelCloseButtonVisibility="Collapsed"
RowIndicatorVisibility="Collapsed"
IsSynchronizedWithCurrentItem="True"
IsFilteringAllowed="True"
CanUserDeleteRows="False"
CanUserFreezeColumns="False"
ShowColumnSortIndexes="False"
MouseDoubleClick="InsertableRow_OnMouseDoubleClick"
ItemsSource="{Binding FieldsForBindingOnly, Mode=OneWay}"
SelectedItem="{Binding SelectedField, Mode=TwoWay}">