fix: fix EnumSelector default Width & Alignment.

demo/Ursa.Demo/Pages/ElasticWrapPanelDemo.axaml

@@ -18,12 +18,16 @@
             <Setter Property="Width" Value="{Binding ItemSelfWidth}" />
             <Setter Property="Height" Value="{Binding ItemSelfHeight}" />
         </Style>
+        <Style Selector="u|EnumSelector">
+            <Setter Property="HorizontalAlignment" Value="Stretch" />
+        </Style>
     </UserControl.Styles>
     <DockPanel>
         <u:Form DockPanel.Dock="Left"
                 LabelAlignment="Left"
                 LabelPosition="Left"
-                LabelWidth="*">
+                LabelWidth="*"
+                Margin="4 0">
             <u:FormGroup>
                 <u:FormItem Label="Orientation">
                     <u:EnumSelector EnumType="Orientation" Value="{Binding SelectedOrientation}" />

src/Ursa.Themes.Semi/Controls/EnumSelector.axaml

@@ -4,12 +4,13 @@
     xmlns:u="https://irihi.tech/ursa">
     <!--  Add Resources Here  -->
     <ControlTheme x:Key="{x:Type u:EnumSelector}" TargetType="u:EnumSelector">
-        <Setter Property="Width" Value="100" />
-        <Setter Property="HorizontalAlignment" Value="Left"></Setter>
+        <Setter Property="HorizontalAlignment" Value="Left" />
         <Setter Property="Template">
             <ControlTemplate TargetType="u:EnumSelector">
                 <ComboBox
-                    Width="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Bounds.Width}"
+                    Width="{TemplateBinding Width}"
+                    HorizontalAlignment="{TemplateBinding HorizontalAlignment}"
+                    VerticalAlignment="{TemplateBinding VerticalAlignment}"
                     Name="PART_ComboBox"
                     ItemsSource="{TemplateBinding Values}"
                     SelectedItem="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=SelectedValue, Mode=TwoWay}" />