Show PDF as route

lib/ui/invoice/invoice_pdf.dart

@@ -177,23 +177,7 @@ class _InvoicePdfViewState extends State<InvoicePdfView> {
             Spacer(),
           ];
 
-    return Scaffold(
+    final deliveryNote = Theme(
-        backgroundColor: Colors.grey,
-        appBar: widget.showAppBar
-            ? AppBar(
-                centerTitle: false,
-                automaticallyImplyLeading: isMobile(context),
-                title: Row(
-                  children: [
-                    if (isDesktop(context)) ...[
-                      Text(localization.lookup('${invoice.entityType}') +
-                          ' ' +
-                          (invoice.number ?? '')),
-                      Spacer(),
-                    ],
-                    if (isDesktop(context)) ...activitySelector,
-                    if (isDesktop(context)) ...pageSelector,
-                    Theme(
       data: ThemeData(
         unselectedWidgetColor: state.headerTextColor,
       ),
@@ -217,7 +201,23 @@ class _InvoicePdfViewState extends State<InvoicePdfView> {
           activeColor: state.accentColor,
         ),
       ),
-                    ),
+    );
+
+    return Scaffold(
+        backgroundColor: Colors.grey,
+        appBar: widget.showAppBar
+            ? AppBar(
+                centerTitle: false,
+                automaticallyImplyLeading: isMobile(context),
+                title: Row(
+                  children: [
+                    Text(localization.lookup('${invoice.entityType}') +
+                        '  ›  ' +
+                        invoice.number),
+                    Spacer(),
+                    if (isDesktop(context)) ...activitySelector,
+                    if (isDesktop(context)) ...pageSelector,
+                    if (isDesktop(context)) deliveryNote,
                   ],
                 ),
                 actions: <Widget>[