pos_customer_display: Add button "Display Total to Customer" and port to new API

pos_payment_terminal: code cleanup

pos_payment_terminal/static/src/js/pos_payment_terminal.js

@@ -11,8 +11,6 @@ openerp.pos_payment_terminal = function(instance){
         },
     });
 
-    //TODO make the button bigger and with better name
-
     var _super_PaymentScreenWidget_init_ = module.PaymentScreenWidget.prototype.init;
     module.PaymentScreenWidget.prototype.init = function(parent, options){
         _super_PaymentScreenWidget_init_.call(this, parent, options);

pos_payment_terminal/static/src/xml/pos_payment_terminal.xml

@@ -3,14 +3,9 @@
     <t t-extend="Paymentline" >
         <t t-jquery=".paymentline-input" t-operation="append">
             <t t-if="line.cashregister.journal.payment_mode">
-				<!--	<t t-if="pos.config.iface_payment_terminal">-->
                 <span class="payment-terminal-transaction-start">
-		                    <button>
-								Start transaction
-			                    <!--<t t-esc="line.cashregister.journal.payment_mode"/> -->
-				            </button>
+                    <button>Start transaction</button>
                 </span>
-				<!--	</t> -->
             </t>
         </t>
     </t>