Refactor module layout

data/ui/editor/translation.blp

@@ -0,0 +1,24 @@
+using Gtk 4.0;
+using Adw 1;
+
+template $MusicusTranslationEditor: Adw.Bin {
+  Gtk.ListBox list_box {
+    selection-mode: none;
+
+    styles [
+      "boxed-list"
+    ]
+
+    Adw.EntryRow entry_row {
+      title: _("_Name");
+      use-underline: true;
+    }
+
+    Adw.ButtonRow {
+      title: _("Add _translation");
+      start-icon-name: "list-add-symbolic";
+      use-underline: true;
+      activated => $add_translation() swapped;
+    }
+  }
+}