Improve move form layout

Add colspan to origin field because otherwise left side of the form occupies
70% of the left side due to the fact that the reference widget is composed by
2 widgets.

issue5540
review23071002

view/move_form.xml

@@ -25,8 +25,7 @@ this repository contains the full copyright notices and license terms. -->
     <label name="effective_date"/>
     <field name="effective_date"/>
     <label name="origin"/>
-    <field name="origin"/>
-    <separator colspan="4" id="separator"/>
+    <field name="origin" colspan="3"/>
     <label name="state"/>
     <field name="state"/>
     <group col="20" colspan="2" id="buttons">