fix warning, add datatables into /contract/create

- fix warning caused by missing "widget" attribute
- use datatables to select contacts in /contract/create

lib/NGCP/Panel/Field/Contact.pm

@@ -3,9 +3,12 @@ use HTML::FormHandler::Moose;
 extends 'HTML::FormHandler::Field::Compound';
 
 has_field 'contact' => (
-    type => '+NGCP::Panel::Field::ContactSelect',
+    type => '+NGCP::Panel::Field::DataTable',
     label => 'Contact',
     required => 1,
+    do_wrapper => 0,
+    ajax_src => '/contact/ajax',
+    table_fields => ['#', 'First Name', 'Last Name', 'Email'],
 );
 
 has_field 'create' => (

lib/NGCP/Panel/Field/DataTable.pm

@@ -3,7 +3,10 @@ use Moose;
 use Template;
 extends 'HTML::FormHandler::Field';
 
-has 'template' => ( isa => 'Str', is => 'rw' );
+has '+widget' => (default => ''); # leave this empty, as there is no widget ...
+has 'template' => ( isa => 'Str',
+                    is => 'rw',
+                    default => 'share/templates/helpers/datatables_field.tt' );
 has 'ajax_src' => ( isa => 'Str', is => 'rw' );
 has 'table_fields' => ( isa => 'ArrayRef', is => 'rw' );