[FIX] point_of_sale: correctly split workds in product search

The JS replace method, unlike python's, only replaces the first occurence
unless a search pattern is provided.

Closes #6302

addons/point_of_sale/static/src/js/db.js

@@ -362,7 +362,7 @@ function openerp_pos_db(instance, module){
         search_product_in_category: function(category_id, query){
             try {
                 query = query.replace(/[\[\]\(\)\+\*\?\.\-\!\&\^\$\|\~\_\{\}\:\,\\\/]/g,'.');
-                query = query.replace(' ','.+');
+                query = query.replace(/ /g,'.+');
                 var re = RegExp("([0-9]+):.*?"+query,"gi");
             }catch(e){
                 return [];