Remove string attribute from views

issue2350

view/agent_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="Agent">
+<form>
     <label name="party"/>
     <field name="party"/>
     <group col="2" colspan="2" id="type_">

view/agent_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="Agents">
+<tree>
     <field name="party"/>
     <field name="type_"/>
     <field name="company"/>

view/commission_create_invoice_ask_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="Create Commission Invoice">
+<form>
     <label name="from_"/>
     <field name="from_"/>
     <label name="to"/>

view/commission_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="Commission">
+<form>
     <label name="agent"/>
     <field name="agent"/>
     <label name="date"/>

view/commission_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="Commissions">
+<tree>
     <field name="type_"/>
     <field name="agent"/>
     <field name="date"/>

view/plan_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="Commission Plan">
+<form>
     <label name="name"/>
     <field name="name"/>
     <newline/>

view/plan_line_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="Commission Plan Line">
+<form>
     <label name="plan"/>
     <field name="plan"/>
     <newline/>

view/plan_line_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="Commission Plan Lines">
+<tree>
     <field name="plan"/>
     <field name="sequence"/>
     <field name="product"/>

view/plan_line_list_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="Commission Plan Lines" sequence="sequence">
+<tree sequence="sequence">
     <field name="product"/>
     <field name="formula"/>
 </tree>

view/plan_list.xml

@@ -1,6 +1,6 @@
 <?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="Commission Plans">
+<tree>
     <field name="name"/>
 </tree>