[FIX] base: contact image wrongly displayed

The image of a contact of a company was wrongly resized.
Use image_small instead of image for correct ratio (anyway 48x48px).
Remove image_preview as always use image_small (was wrongly positioned and
considered as cache attribute, getting '&cache=NaN' urls...)
opw 593992

openerp/addons/base/res/res_partner_view.xml

@@ -215,7 +215,7 @@
                                                 <div class="oe_module_vignette">
                                                 <a type="open">
                                                     <t t-if="record.has_image.raw_value === true">
-                                                        <img t-att-src="kanban_image('res.partner', 'image', record.id.value, {'preview_image': 'image_small'})" class="oe_avatar oe_kanban_avatar_smallbox"/>
+                                                        <img t-att-src="kanban_image('res.partner', 'image_small', record.id.value)" class="oe_avatar oe_kanban_avatar_smallbox"/>
                                                     </t>
                                                     <t t-if="record.image and record.image.raw_value !== false">
                                                         <img t-att-src="'data:image/png;base64,'+record.image.raw_value" class="oe_avatar oe_kanban_avatar_smallbox"/>