[launcher] add missing import of graylog port and host values

tomwer/app/canvas_launcher/launcher.py

@@ -8,6 +8,7 @@ from .splash import splash_screen, getIcon
 import tomwer.version
 from tomwer.gui import icons
 from tomwer.core.log.logger import _formatter_message, _ColoredFormatter
+from tomwer.web.config import grayport_port, grayport_host
 import logging
 try:
     import graypy