[ADD] hide the widget if the user has right on only one company. (following Arthru's remark)

web_easy_switch_company/static/src/js/switch_company.js

@@ -40,6 +40,11 @@ openerp.web_easy_switch_company = function (instance) {
         renderElement: function() {
             var self = this;
             this._super();
+            if (this.companies.length === 1) {
+                this.$el.hide();
+            }
+            else{
+                this.$el.show();
                 this.$el.find('.easy_switch_company_company_item').on('click', function(ev) {
                     var company_id = $(ev.target).data("company-id");
                     if (company_id != self.current_company_id){
@@ -50,6 +55,7 @@ openerp.web_easy_switch_company = function (instance) {
                         });
                     }
                 });
+            }
         },
 
         /***********************************************************************