progress row: improve performance with ListBoxRow

Adw.ActionRow is rather complex and does not perform well with ListBox
models. Use simpler ListBoxRow as base to increase performance.

data/resources/ui/widgets/progress_row.blp

@@ -1,11 +1,26 @@
 using Gtk 4.0;
 using Adw 1;
 
-template ProgressRow : Adw.ActionRow {
+template ProgressRow : ListBoxRow {
   activatable: true;
   focusable: true;
+  child: Box {
+    hexpand: true;
+    margin-start: 12;
+    margin-end: 12;
+    margin-top: 12;
+    margin-bottom: 12;
+    spacing: 6;
 
-  Image {
-    icon-name: "go-next-symbolic";
-  }
+    Label title {
+      ellipsize: end;
+      hexpand: true;
+      xalign: 0;
+    }
+
+    Image {
+      halign: end;
+      icon-name: "go-next-symbolic";
+    }
+  };
 }

src/ui/widgets.py

@@ -49,18 +49,20 @@ class PageWrapper(Gtk.Box):
         return self.content.get_child()
 
 @Gtk.Template(resource_path='/com/github/p3732/os-installer/ui/widgets/progress_row.ui')
-class ProgressRow(Adw.ActionRow):
+class ProgressRow(Gtk.ListBoxRow):
     __gtype_name__ = 'ProgressRow'
 
-    def __init__(self, label, additional_info, **kwargs):
+    title = Gtk.Template.Child()
+
+    def __init__(self, label, additional_info = None, **kwargs):
         super().__init__(**kwargs)
 
-        self.set_title(label)
+        self.title.set_label(label)
 
         self.info = additional_info
 
     def get_label(self):
-        return self.get_title()
+        return self.title.get_label()
 
 
 @Gtk.Template(resource_path='/com/github/p3732/os-installer/ui/widgets/selection_row.ui')