(GUI): added dropdown list to settings widgets.

GUI/SettingsWindow.xaml

@@ -58,6 +58,12 @@ IN THE SOFTWARE.
                 </StackPanel>
             </StackPanel>
         </ControlTemplate>
+        <ControlTemplate x:Key="BoundDropDownList" TargetType="ComboBox">
+            <StackPanel Orientation="Vertical" Margin="2" DataContext="{TemplateBinding DataContext}">
+                <TextBlock Text="{Binding Text}" ToolTip="{Binding Description}" Foreground="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
+                <ComboBox ItemsSource="{Binding Path=Source.ValuesSet}" SelectedItem="{Binding Value, Mode=TwoWay}" Margin="0,4,0,0"/>
+            </StackPanel>
+        </ControlTemplate>
 
         <Style x:Key="ExpandCollapseToggleStyle" TargetType="ToggleButton">
             <Setter Property="Focusable" Value="False"/>

GUI/SettingsWindow.xaml.cs

@@ -191,10 +191,20 @@ namespace GARbro.GUI
             };
         }
 
+        UIElement CreateDropDownWidget (FixedSetSetting setting)
+        {
+            return new ComboBox {
+                Template = (ControlTemplate)this.Resources["BoundDropDownList"],
+                DataContext = CreateSettingView<object> (setting),
+            };
+        }
+
         UIElement CreateSettingWidget<TUnknown> (IResourceSetting setting, TUnknown value)
         {
             if (setting is FixedGaugeSetting)
                 return CreateGaugeWidget (setting as FixedGaugeSetting);
+            if (setting is FixedSetSetting)
+                return CreateDropDownWidget (setting as FixedSetSetting);
             if (value is bool)
                 return CreateCheckBoxWidget (setting);
             if (value is Encoding)