Remove redundant widget modules in subcrates

Instead, we can define the type aliases just once in the root crate!

native/src/widget/scrollable.rs

@@ -15,6 +15,13 @@ use std::{f32, u32};
 
 pub use iced_style::scrollable::StyleSheet;
 
+pub mod style {
+    //! The styles of a [`Scrollable`].
+    //!
+    //! [`Scrollable`]: crate::widget::Scrollable
+    pub use iced_style::scrollable::{Scrollbar, Scroller};
+}
+
 /// A widget that can vertically display an infinite amount of content with a
 /// scrollbar.
 #[allow(missing_debug_implementations)]

native/src/widget/toggler.rs

@@ -1,5 +1,4 @@
 //! Show toggle controls using togglers.
-
 use crate::alignment;
 use crate::event;
 use crate::layout;
@@ -14,7 +13,7 @@ use crate::{
 
 pub use iced_style::toggler::{Style, StyleSheet};
 
-/// A toggler widget
+/// A toggler widget.
 ///
 /// # Example
 ///