feat: allow access to ListColumn on Section

Author: acolombier

src/widget/settings/section.rs

@@ -20,6 +20,25 @@ pub struct Section<'a, Message> {
     children: ListColumn<'a, Message>,
 }
 
+impl<'a, Message: 'static> Section<'a, Message> {
+    /// Access the ListColumn element of the current Section to edit its parameters
+    /// 
+    /// # Example
+    /// 
+    /// ```
+    /// use cosmic::widget::{settings, text};
+    /// 
+    /// settings::view_section("My section")
+    ///   .edit_list_column(|column| column.spacing(42))
+    ///   .add(text("My item 1"))
+    ///   .add(text("My item 2"))
+    /// ```
+    pub fn edit_list_column(mut self, closure: impl FnOnce(ListColumn<'a, Message>) -> ListColumn<'a, Message>) -> Self {
+        self.children = closure(self.children);
+        self
+    }
+}
+
 impl<'a, Message: 'static> Section<'a, Message> {
     #[must_use]
     #[allow(clippy::should_implement_trait)]