load_config: do not treat ':' as delimiter

The default value of delimiters is ('=', ':') but sensors might have ':'
in the name.

Author: dancleaver

s_tui/s_tui.py

@@ -634,7 +634,7 @@ def _load_config(self, t_thresh):
         # Use user config file if one was saved before
         self.conf = None
         if user_config_file_exists():
-            self.conf = configparser.ConfigParser()
+            self.conf = configparser.ConfigParser(delimiters="=")
             self.conf.read(get_user_config_file())
         else:
             logging.debug("Config file not found")