fixed title on 3 dialog boxes (they were showing "python" as title)

gui/qt/main_window.py

@@ -1398,6 +1398,7 @@ class ElectrumWindow(QMainWindow):
     def new_contact_dialog(self):
 
         d = QDialog(self)
+        d.setWindowTitle(_("New Contact"))
         vbox = QVBoxLayout(d)
         vbox.addWidget(QLabel(_('New Contact')+':'))
 
@@ -1787,6 +1788,7 @@ class ElectrumWindow(QMainWindow):
     def password_dialog(self ):
         d = QDialog(self)
         d.setModal(1)
+        d.setWindowTitle(_("Enter Password"))
 
         pw = QLineEdit()
         pw.setEchoMode(2)

gui/qt/password_dialog.py

@@ -103,6 +103,7 @@ class PasswordDialog(QDialog):
         self.setModal(1)
         self.wallet = wallet
         self.parent = parent
+        self.setWindowTitle(_("Set Password"))
         msg = (_('Your wallet is encrypted. Use this dialog to change your password.') + ' '\
                +_('To disable wallet encryption, enter an empty new password.')) \
                if wallet.use_encryption else _('Your wallet keys are not encrypted')