Fix TimePicker to respect custom Width property (#20507)

* Fix TimePicker to respect Width by removing MinWidth from internal Button

* Add MinWidth to DatePicker for consistency

src/Avalonia.Themes.Fluent/Controls/DatePicker.xaml

@@ -93,6 +93,7 @@
                     BorderThickness="{TemplateBinding BorderThickness}"
                     CornerRadius="{TemplateBinding CornerRadius}"
                     IsEnabled="{TemplateBinding IsEnabled}"
+                    MinWidth="{TemplateBinding MinWidth}"
                     MaxWidth="{TemplateBinding MaxWidth}"
                     HorizontalAlignment="Stretch"
                     VerticalAlignment="Stretch"

src/Avalonia.Themes.Fluent/Controls/TimePicker.xaml

@@ -78,6 +78,8 @@
     <Setter Property="CornerRadius" Value="{DynamicResource ControlCornerRadius}" />
     <Setter Property="HorizontalAlignment" Value="Left" />
     <Setter Property="VerticalAlignment" Value="Center" />
+    <Setter Property="MinWidth" Value="{DynamicResource TimePickerThemeMinWidth}" />
+    <Setter Property="MaxWidth" Value="{DynamicResource TimePickerThemeMaxWidth}" />
     <Setter Property="Template">
       <ControlTemplate>
         <DataValidationErrors>
@@ -90,8 +92,8 @@
                     BorderThickness="{TemplateBinding BorderThickness}"
                     CornerRadius="{TemplateBinding CornerRadius}"
                     IsEnabled="{TemplateBinding IsEnabled}"
-                    MinWidth="{DynamicResource TimePickerThemeMinWidth}"
-                    MaxWidth="{DynamicResource TimePickerThemeMaxWidth}"
+                    MinWidth="{TemplateBinding MinWidth}"
+                    MaxWidth="{TemplateBinding MaxWidth}"
                     HorizontalAlignment="Stretch"
                     VerticalAlignment="Stretch">