[FIX] point_of_sale, hw_drivers: Payment terminals fixes

Different fixes for Payment Terminals in saas-12.5

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closes odoo/odoo#36255

Signed-off-by: Quentin Lejeune (qle) <qle@odoo.com>

addons/hw_drivers/controllers/driver.py

@@ -474,6 +474,11 @@ if terminal_id:
     eftapi = ctypes.CDLL("eftapi.so")  # Library given by Six
     mpdm.daemon = True
     mpdm.start()
+else:
+    try:
+        subprocess.check_call(["pkill", "9", "eftdvs"])  # Check if MPD server is running
+    except subprocess.CalledProcessError:
+        pass
 
 m = Manager()
 m.daemon = True

addons/point_of_sale/static/src/js/screens.js

@@ -2029,6 +2029,7 @@ var PaymentScreenWidget = ScreenWidget.extend({
                     line.set_amount(0);
                     line.set_payment_status('reversed');
                 } else {
+                    line.can_be_reversed = false;
                     line.set_payment_status('done');
                 }
                 self.render_paymentlines();