message: reflect selected count on main screen
diff: Margin="0,0,0,24" Orientation="Horizontal">
  <TextBlock VerticalAlignment="Center" FontWeight="Bold" Margin="0,-4,0,0" FontSize="16" >&#x2211;&#x202F;&#x202F;&#x202F;&#x202F;</TextBlock>
  <TextBlock VerticalAlignment="Center" FontWeight="Bold" Style="{StaticResource BaseTextBlockStyle}"
  - Text="{Binding TabularObjectMeasuresCount}"/>
  + Text="{Binding SelectionTreeData.SelectedTreeItemCount}"/>
  <TextBlock VerticalAlignment="Center" FontWeight="Bold" Style="{StaticResource BaseTextBlockStyle}">&#x202F;&#x202F;&#x202F;formulas</TextBlock>
  <TextBlock VerticalAlignment="Center" Margin="30,0,0,0"><Hyperlink Style="{StaticResource InlineHyperlinks}" Command="{Binding ChangeFormulasCommand}" >Change</Hyperlink></TextBlock>
  </StackPanel>
  