Added LinkTextRelatedEntity widget

lib/ui/app/copy_to_clipboard.dart

@@ -40,19 +40,9 @@ class CopyToClipboard extends StatelessWidget {
     };
 
     if (showBorder) {
-      return GestureDetector(
-        onTap: onTap,
-        child: Container(
-          constraints: BoxConstraints(maxWidth: 180),
-          padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
-          decoration: BoxDecoration(
-            border: Border.all(
-              color: Colors.grey,
-            ),
-            borderRadius: BorderRadius.all(Radius.circular(20)),
-          ),
-          child: widget,
-        ),
+      return ConstrainedBox(
+        child: OutlinedButton(onPressed: onTap, child: widget),
+        constraints: BoxConstraints(maxWidth: 180),
       );
     } else {
       return InkWell(

lib/ui/app/link_text.dart

@@ -1,10 +1,41 @@
 // Flutter imports:
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
+import 'package:invoiceninja_flutter/data/models/entities.dart';
+import 'package:invoiceninja_flutter/redux/app/app_actions.dart';
 
 // Package imports:
 import 'package:url_launcher/url_launcher.dart';
 
+class LinkTextRelatedEntity extends StatelessWidget {
+  const LinkTextRelatedEntity({
+    Key key,
+    @required this.label,
+    @required this.entity,
+    @required this.relation,
+  }) : super(key: key);
+
+  final String label;
+  final BaseEntity entity;
+  final BaseEntity relation;
+
+  @override
+  Widget build(BuildContext context) {
+    return GestureDetector(
+      child: Text(
+        label,
+        textAlign: TextAlign.center,
+        style: TextStyle(decoration: TextDecoration.underline),
+      ),
+      onTap: () {
+        print('## clicked: ${DateTime.now()}');
+        viewEntity(entity: relation);
+        viewEntity(entity: entity, addToStack: true);
+      },
+    );
+  }
+}
+
 class LinkTextSpan extends TextSpan {
   LinkTextSpan({TextStyle style, String url, String text})
       : super(

lib/ui/invoice/invoice_presenter.dart

@@ -10,6 +10,7 @@ import 'package:invoiceninja_flutter/redux/app/app_state.dart';
 import 'package:invoiceninja_flutter/redux/invoice/invoice_selectors.dart';
 import 'package:invoiceninja_flutter/ui/app/copy_to_clipboard.dart';
 import 'package:invoiceninja_flutter/ui/app/entities/entity_status_chip.dart';
+import 'package:invoiceninja_flutter/ui/app/link_text.dart';
 import 'package:invoiceninja_flutter/ui/app/presenters/entity_presenter.dart';
 import 'package:invoiceninja_flutter/utils/formatting.dart';
 import 'package:invoiceninja_flutter/utils/localization.dart';
@@ -78,9 +79,8 @@ class InvoicePresenter extends EntityPresenter {
             ? localization.pending
             : invoice.number);
       case InvoiceFields.client:
-        return Text((state.clientState.map[invoice.clientId] ??
-                ClientEntity(id: invoice.clientId))
-            .listDisplayName);
+        return LinkTextRelatedEntity(
+            label: client.displayName, entity: client, relation: invoice);
       case InvoiceFields.project:
         return Text(state.projectState.get(invoice.projectId).listDisplayName);
       case InvoiceFields.vendor: