migration to PyQt5. initial commit.

gui/qt/password_dialog.py

@@ -28,8 +28,8 @@ from __future__ import print_function
 from __future__ import unicode_literals
 
 import six
-from PyQt4.QtGui import *
-from PyQt4.QtCore import *
+from PyQt5.QtGui import *
+from PyQt5.QtCore import *
 from electrum.i18n import _
 from .util import *
 import re