Set the default cleanable to false for new dropdown (#63)

crates/story/src/dropdown_story.rs

@@ -61,8 +61,9 @@ impl DropdownStory {
             Country::new("Ecuador", "EC"),
         ];
 
-        let country_dropdown =
-            cx.new_view(|cx| Dropdown::new("dropdown-country", countries, Some(6), cx));
+        let country_dropdown = cx.new_view(|cx| {
+            Dropdown::new("dropdown-country", countries, Some(6), cx).cleanable(true)
+        });
 
         let fruits = vec![
             "Apple",

crates/ui/src/dropdown.rs

@@ -212,7 +212,7 @@ where
             size: Size::Medium,
             selected_value: None,
             open: false,
-            cleanable: true,
+            cleanable: false,
             title_prefix: None,
         };
         this.set_selected_index(selected_index, cx);