Merchant: fix leaving the page

pages/merchant/Merchant.qml

@@ -33,8 +33,6 @@ Item {
     property var    hiddenAmounts: []
 
     function onPageCompleted() {
-        appWindow.hideMenu();
-
         // prepare tracking
         trackingCheckbox.checked = root.enableTracking
         root.update();
@@ -56,8 +54,6 @@ Item {
         timer.running = false
         root.enableTracking = false
         trackingModel.clear()
-
-        appWindow.showMenu();
     }
 
     Image {