Switch to using ToolbarView

src/ui/utility.rs

@@ -197,6 +197,16 @@ macro_rules ! application_window { (
 	window
 } } }
 
+macro_rules ! toolbar_view { (
+	$ ( @ top_bar : $ top_bar : expr ; ) ?
+	$ ( $ content : expr ) ? $ (,) ?
+) => { {
+	let widget = libadwaita :: ToolbarView :: new () ;
+	$ ( widget . add_top_bar ( $ top_bar ) ; ) ?
+	$ ( widget . set_content ( Some ( $ content ) ) ; ) ?
+	widget
+} } }
+
 macro_rules ! vertically_filling { ( $ child : expr ) => {
 	g_box ! (
 		@ orientation : gtk4 :: Orientation :: Vertical ;
@@ -236,6 +246,7 @@ pub (crate) use {
 	header_bar ,
 	bin ,
 	application_window ,
+	toolbar_view ,
 	vertically_filling ,
 	pango_attributes ,
 } ;