[FIX] point_of_sale: products search with ':' in products names

This is related to revision bb913d0.

':' in product names are removed, to avoid issues when
searching products with ':' in their name.

JS replace method only replaces the first occurence, if the
needle isn't set as a regex with 'g', e.g. /':'/g

opw-634547

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

@@ -146,7 +146,7 @@ function openerp_pos_db(instance, module){
             for (var i = 0; i < packagings.length; i++) {
                 str += '|' + packagings[i].ean;
             }
-            str  = product.id + ':' + str.replace(':','') + '\n';
+            str  = product.id + ':' + str.replace(/:/g,'') + '\n';
             return str;
         },
         add_products: function(products){