[Qt] misc PaymentServer changes (e.g. changes to eventFilter())

- make eventFilter() private and pass events on to QObject::eventFilter()
  instead of just returning false
- re-work paymentservertest.cpp to correctly handle the event test
  after the above change (rewrite test_main to allow usage of
  QCoreApplication:: in the tests)
- delete socket when we were unable to connect in ipcSendCommandLine()
- show a message to the user if we fail to start-up (instead of just a
  debug.log entry)
- misc small comment changes

1 files changed, 2 insertions, 0 deletions

diff --git a/src/qt/test/paymentservertests.h b/src/qt/test/paymentservertests.h
index 0bff923ad..884e535a6 100644
--- a/src/qt/test/paymentservertests.h
+++ b/src/qt/test/paymentservertests.h
@@ -20,8 +20,10 @@ private slots:
 class RecipientCatcher : public QObject
 {
     Q_OBJECT
+
 public slots:
     void getRecipient(SendCoinsRecipient r);
+
 public:
     SendCoinsRecipient recipient;
 };