Hi,
Do you know why it is not working ? I mean why class="oe_highlight" doesnt work in tree mode?
<group col="2" colspan="2" >
<separator string="Separator" colspan="2" />
<field name="field_lines" colspan="2" nolabel="1" readonly="1" >
<tree editable="bottom" >
<field name="somefield />
<button type="object" string="String" name="button_method" class="oe_highlight" />
</tree>
</field>
</group>