[IMP] @editable on forms and fields is nonsense, on trees it should only be able to take the values 'top' and 'bottom'

bzr revid: xmo@openerp.com-20110531101518-1ycw1fjy5vczcf8g

openerp/addons/base/ir/ir.xml

@@ -1895,7 +1895,7 @@
             <field name="name">Config Wizard Steps</field>
             <field name="type">form</field>
             <field name="arch" type="xml">
-                <form editable="bottom" string="Config Wizard Steps">
+                <form string="Config Wizard Steps">
                     <group colspan="4" col="6">
                         <field name="action_id"/>
                         <field name="restart"/>

openerp/addons/base/rng/view.rng

@@ -72,7 +72,6 @@
         <rng:element name="form">
             <rng:ref name="overload"/>
             <rng:optional><rng:attribute name="string"/></rng:optional>
-            <rng:optional><rng:attribute name="editable"/></rng:optional>
             <rng:optional><rng:attribute name="type"/></rng:optional>
             <rng:optional><rng:attribute name="link"/></rng:optional>
             <rng:ref name="container"/>
@@ -126,7 +125,14 @@
             <rng:optional><rng:attribute name="string"/></rng:optional>
             <rng:optional><rng:attribute name="colors"/></rng:optional>
             <rng:optional><rng:attribute name="color"/></rng:optional>
-            <rng:optional><rng:attribute name="editable"/></rng:optional>
+            <rng:optional>
+              <rng:attribute name="editable">
+                <rng:choice>
+                  <rng:value>top</rng:value>
+                  <rng:value>bottom</rng:value>
+                </rng:choice>
+              </rng:attribute>
+            </rng:optional>
             <rng:optional><rng:attribute name="toolbar"/></rng:optional>
             <rng:optional><rng:attribute name="link"/></rng:optional>
             <rng:optional><rng:attribute name="type"/></rng:optional>
@@ -412,7 +418,6 @@
             <rng:attribute name="name" />
             <rng:ref name="overload"/>
             <rng:ref name="access_rights"/>
-            <rng:optional><rng:attribute name="editable"/></rng:optional>
             <rng:optional><rng:attribute name="domain_filter"/></rng:optional>
             <rng:optional><rng:attribute name="attrs"/></rng:optional>
             <rng:optional><rng:attribute name="string"/></rng:optional>