Backoffice advanced search mode by default

Is there a way to display the Advanced Search widget for a particular type in advanced-search mode by default (including the search fields already visible)?

I am trying this:

 <context type="SomeType" component="advanced-search" merge-by="type" module="some-extension">
     <as:advanced-search disable-simple-search="true" disable-auto-search="true" xmlns:as="http://www.hybris.com/cockpitng/config/advancedsearch" xmlns="http://www.hybris.com/cockpitng/config/advancedsearch">
         <field-list>
             <field name="someAttribute" selected="true"/>
             <field editor="java.lang.Long" name="pk" selected="false"/>
         </field-list>
     </as:advanced-search>
 </context>

With that, the advanced search doesn't let enter a search text (which I understand as "simple-search" mode), which is at least something.
But I still have to click the "looking glass" button in order to expand the panel that contains the field someAttribute.
I think that, as we have explicitly indicated that we want advanced-search mode, these fields should be directly visible by default, shouldn't they? Any ideas?

Cheers,
Carlos