chore: re-export iced row and column

This removes the custom row and column implementations and uses the iced ones directly.

examples/about/src/main.rs

@@ -132,7 +132,7 @@ impl cosmic::Application for App {
     fn view(&self) -> Element<'_, Self::Message> {
         let show_about_button = widget::button::text("Show about").on_press(Message::ToggleAbout);
         let centered = cosmic::widget::container(
-            widget::column()
+            widget::column::with_capacity(1)
                 .push(show_about_button)
                 .width(Length::Fill)
                 .height(Length::Shrink)

examples/application/src/main.rs

@@ -54,7 +54,7 @@ impl widget::menu::Action for Action {
 /// Runs application with these settings
 #[rustfmt::skip]
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    
+
     env_logger::Builder::from_env(env_logger::Env::default().default_filter_or("warn")).init();
 
 
@@ -190,7 +190,7 @@ impl cosmic::Application for App {
             .map_or("No page selected", String::as_str);
 
         let centered = widget::container(
-            widget::column()
+            widget::column::with_capacity(5)
                 .push(widget::text::body(page_content))
                 .push(
                     widget::text_input::text_input("", &self.input_1)

examples/calendar/src/main.rs

@@ -85,8 +85,6 @@ impl cosmic::Application for App {
 
     /// Creates a view after each update.
     fn view(&self) -> Element<'_, Self::Message> {
-        let mut content = cosmic::widget::column().spacing(12);
-
         let calendar = cosmic::widget::calendar(
             &self.calendar_model,
             |date| Message::DateSelected(date),
@@ -95,9 +93,7 @@ impl cosmic::Application for App {
             Weekday::Sunday,
         );
 
-        content = content.push(calendar);
-
-        let centered = cosmic::widget::container(content)
+        let centered = cosmic::widget::container(calendar)
             .width(iced::Length::Fill)
             .height(iced::Length::Shrink)
             .align_x(iced::Alignment::Center)

examples/image-button/src/main.rs

@@ -80,7 +80,7 @@ impl cosmic::Application for App {
 
     /// Creates a view after each update.
     fn view(&self) -> Element<'_, Self::Message> {
-        let mut content = cosmic::widget::column().spacing(12);
+        let mut content = cosmic::widget::column::with_capacity(self.images.len()).spacing(12);
 
         for (id, image) in self.images.iter().enumerate() {
             content = content.push(

examples/subscriptions/src/main.rs

@@ -64,7 +64,7 @@ impl cosmic::Application for App {
 
     /// Creates a view after each update.
     fn view(&self) -> Element<'_, Self::Message> {
-        widget::row().into()
+        widget::Row::new().into()
     }
 }
 

examples/text-input/src/main.rs

@@ -99,7 +99,9 @@ impl cosmic::Application for App {
 
         let inline = cosmic::widget::inline_input("", &self.input).on_input(Message::Input);
 
-        let column = cosmic::widget::column().push(editable).push(inline);
+        let column = cosmic::widget::column::with_capacity(2)
+            .push(editable)
+            .push(inline);
 
         let centered = cosmic::widget::container(column.width(200))
             .width(iced::Length::Fill)