Remove string attribute from views

issue2350

view/action_form.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
 this repository contains the full copyright notices and license terms. -->
-<form string="Customer Complaint Action">
+<form>
     <label name="complaint"/>
     <field name="complaint" colspan="3"/>
     <label name="action"/>

view/action_list.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
 this repository contains the full copyright notices and license terms. -->
-<tree string="Customer Complaint Actions">
+<tree>
     <field name="complaint" expand="1"/>
     <field name="action" expand="1"/>
     <field name="result"/>

view/complaint_form.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
 this repository contains the full copyright notices and license terms. -->
-<form string="Customer Complaint" cursor="customer">
+<form cursor="customer">
     <label name="reference"/>
     <field name="reference"/>
     <label name="number"/>

view/complaint_list.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
 this repository contains the full copyright notices and license terms. -->
-<tree string="Customer Complaints">
+<tree>
     <field name="number"/>
     <field name="reference"/>
     <field name="date"/>

view/type_form.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
 this repository contains the full copyright notices and license terms. -->
-<form string="Customer Complaint Type">
+<form>
     <label name="name"/>
     <field name="name"/>
     <label name="origin"/>

view/type_list.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
 this repository contains the full copyright notices and license terms. -->
-<tree string="Customer Complaint Types">
+<tree>
     <field name="name"/>
     <field name="origin"/>
 </tree>