Use selection widget from payment method and writeoff on pay wizard

issue8150
review72421002

view/pay_ask_form.xml

@@ -13,7 +13,7 @@ this repository contains the full copyright notices and license terms. -->
     <label name="currency_writeoff"/>
     <field name="currency_writeoff"/>
     <label name="writeoff"/>
-    <field name="writeoff"/>
+    <field name="writeoff" widget="selection"/>
     <field name="lines" colspan="4"
         view_ids="account_invoice.move_line_view_list_to_pay"/>
     <field name="payment_lines" colspan="4"

view/pay_start_form.xml

@@ -9,7 +9,7 @@ this repository contains the full copyright notices and license terms. -->
     <label name="description"/>
     <field name="description" colspan="3"/>
     <label name="payment_method"/>
-    <field name="payment_method"/>
+    <field name="payment_method" widget="selection"/>
     <label name="date"/>
     <field name="date"/>
     <field name="currency_digits" colspan="4" invisible="1"/>