[FIX] Categories are covered by the product icons when categories are more than one raw

bzr revid: ado@tinyerp.com-20120503135824-fhbl5986i3383ub4

addons/point_of_sale/static/src/css/pos.css

@@ -318,6 +318,8 @@
 }
 .point-of-sale #categories {
     border-bottom: 1px solid #cecbcb;
+    max-height: 114px;    
+    overflow: auto;
 }
 .point-of-sale #categories h4 {
     display: inline-block;

addons/point_of_sale/static/src/js/pos.js

@@ -791,6 +791,7 @@ openerp.point_of_sale = function(db) {
     var CategoryWidget = db.web.OldWidget.extend({
         start: function() {
             this.$element.find(".oe-pos-categories-list a").click(_.bind(this.changeCategory, this));
+            $("#products-screen-ol").css("top",$("#products-screen-categories").height()+"px");
         },
         template_fct: qweb_template('pos-category-template'),
         render_element: function() {