[FIX] mrp: BoM Overview filters display

Since the pager div doesn't appear anymore in the DOM when it would be
empty, the filters buttons (warehouse and display) would be pushed back
to the end of the flex div.

Part of task-2985735

X-original-commit: 4ee3875a6d6faf5563c720fa399eca5b4a1d0e4f
Part-of: odoo/odoo#106935

addons/mrp/static/src/components/bom_overview_control_panel/mrp_bom_overview_control_panel.xml

@@ -42,7 +42,7 @@
             </t>
 
             <t t-set-slot="control-panel-bottom-right">
-                <div class="o_cp_bottom_right_sp">
+                <div class="o_search_options">
                     <t t-if="props.warehouses.length > 1">
                         <Dropdown class="'btn-group'" togglerClass="'btn btn-secondary'">
                             <t t-set-slot="toggler">