[FIX] Bank import writes to browse object

[ADD] direct debit order: process storno during bank import
[ADD] bank import: add hooks for processing debit orders and stornos
[ADD] direct debit order: pre-select move lines on reference substring
	configured in payment mode
[ADD] payment term for direct debit invoices
[ADD] payment line views: add storno field
[RFR] standardize storno and debit order processing during bank import

account_direct_debit/view/account_payment.xml

@@ -45,6 +45,10 @@
                                 icon="gtk-find"
                                 />
                     </xpath>
+                    <xpath expr="//tree[@string='Payment Line']" position="inside">
+                        <!-- the attrs do not work like this, apparently -->
+                        <field name="storno" attrs="{'invisible': [(parent.payment_order_type, '!=', 'debit')]}"/>
+                    </xpath>
                 </data>
             </field>
         </record>
@@ -59,8 +63,22 @@
 	    <field name="type" position="after">
 	      <field name="transfer_account_id"/>
 	      <field name="transfer_journal_id"/>
+              <field name="reference_filter"/>
 	    </field>
 	  </field>
 	</record>
+
+        <record id="view_payment_line_tree" model="ir.ui.view">
+            <field name="name">Payment Lines</field>
+            <field name="model">payment.line</field>
+            <field name="type">tree</field>
+            <field name="inherit_id" ref="account_payment.view_payment_line_tree"/>
+            <field eval="4" name="priority"/>
+            <field name="arch" type="xml">
+                <field name="name" position="after">
+                    <field name="storno"/>
+                </field>
+            </field>
+        </record>
     </data>
 </openerp>