WPF: limit listview multiple selection (#434)

Author: nCastle1

src/Toolkit/Toolkit.WPF/UI/Controls/BasemapGallery/BasemapGallery.Theme.xaml

@@ -225,6 +225,7 @@
                                 VerticalAlignment="{TemplateBinding VerticalAlignment}"
                                 HorizontalContentAlignment="Stretch"
                                 Background="{TemplateBinding Background}"
+                                SelectionMode="Single"
                                 BorderThickness="0"
                                 ScrollViewer.HorizontalScrollBarVisibility="Disabled">
                                 <ListView.Resources>

src/Toolkit/Toolkit.WPF/UI/Controls/FloorFilter/FloorFilter.Theme.xaml

@@ -244,6 +244,7 @@
     <Style x:Key="FloorFilterListStyle" TargetType="ListView">
         <Setter Property="Padding" Value="0" />
         <Setter Property="Margin" Value="0" />
+        <Setter Property="SelectionMode" Value="Single" />
         <Setter Property="BorderThickness" Value="0" />
         <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Disabled" />
         <Setter Property="Foreground" Value="{StaticResource FloorFilterDefaultForegroundBrush}" />

src/Toolkit/Toolkit.WPF/UI/Controls/SearchView/SearchView.Theme.xaml

@@ -356,6 +356,7 @@
                                     ItemTemplate="{StaticResource SourceTemplate}"
                                     ItemsSource="{Binding SearchViewModel.Sources, Mode=OneWay}"
                                     SelectedItem="{Binding SearchViewModel.ActiveSource, Mode=TwoWay}"
+                                    SelectionMode="Single"
                                     Style="{StaticResource ListStyle}" />
                             </StackPanel>
                         </Border>
@@ -493,6 +494,7 @@
                                 ItemContainerStyle="{StaticResource ListContainerStyle}"
                                 ItemsSource="{Binding SearchViewModel.Results, Mode=OneWay}"
                                 SelectedItem="{Binding SearchViewModel.SelectedResult, Mode=OneWayToSource}"
+                                SelectionMode="Single"
                                 Style="{StaticResource ListStyle}">
                                 <ListView.ItemTemplate>
                                     <DataTemplate DataType="{x:Type controls:SearchResult}">