Remove string attribute from views

issue2350

view/address_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="Addresses" col="6">
+<form col="6">
     <label name="party"/>
     <field name="party" colspan="5"/>
     <label name="name"/>

view/address_tree.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="Addresses">
+<tree>
     <field name="party"/>
     <field name="name"/>
     <field name="street"/>

view/address_tree_sequence.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="Addresses" sequence="sequence">
+<tree sequence="sequence">
     <field name="name"/>
     <field name="street"/>
     <field name="streetbis"/>

view/category_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="Category">
+<form>
     <label name="name"/>
     <field name="name"/>
     <label name="active"/>

view/category_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="Categories">
+<tree>
     <field name="rec_name" expand="1"/>
     <field name="active" tree_invisible="1"/>
 </tree>

view/category_tree.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="Categories" keyword_open="1">
+<tree keyword_open="1">
     <field name="name" expand="1"/>
     <field name="parent" tree_invisible="1"/>
     <field name="childs" tree_invisible="1"/>

view/check_vies_result.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="VAT Information Exchange System Results" col="1">
+<form col="1">
     <field name="parties_succeed"/>
     <field name="parties_failed"/>
 </form>

view/configuration_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="Party Configuration">
+<form>
     <label name="party_sequence"/>
     <field name="party_sequence"/>
 </form>

view/contact_mechanism_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="Contact Mechanism" col="6">
+<form col="6">
     <label name="party"/>
     <field name="party" colspan="5"/>
     <label name="type"/>

view/contact_mechanism_tree.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="Contact Mechanisms">
+<tree>
     <field name="party"/>
     <field name="type"/>
     <field name="value"/>

view/contact_mechanism_tree_sequence.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="Contact Mechanisms" sequence="sequence"
+<tree sequence="sequence"
     editable="bottom">
     <field name="type"/>
     <field name="value" expand="1"/>

view/identifier_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="Party Identifier">
+<form>
     <label name="party"/>
     <field name="party"/>
     <newline/>

view/identifier_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="Party Identifiers">
+<tree>
     <field name="party"/>
     <field name="type"/>
     <field name="code" expand="1"/>

view/party_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="Party" col="6">
+<form col="6">
     <label name="name"/>
     <field name="name" xexpand="1"/>
     <label name="code"/>

view/party_tree.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="Parties">
+<tree>
     <field name="code"/>
     <field name="name"/>
     <field name="lang"/>