Move GUI/CLI conditional into get_plugin_logger()

It's cleaner here than in the calling plug.py code.

EDMCLogging.py

@@ -123,7 +123,7 @@ class Logger:
         return self.logger_channel
 
 
-def get_plugin_logger(name: str, loglevel: int = _default_loglevel) -> logging.Logger:
+def get_plugin_logger(plugin_name: str, loglevel: int = _default_loglevel) -> logging.Logger:
     """
     Return a logger suitable for a plugin.
 
@@ -144,7 +144,12 @@ def get_plugin_logger(name: str, loglevel: int = _default_loglevel) -> logging.L
     :param loglevel: Optional logLevel for this Logger.
     :return: logging.Logger instance, all set up.
     """
-    plugin_logger = logging.getLogger(name)
+    if not os.getenv('EDMC_NO_UI'):
+        base_logger_name = appname
+    else:
+        base_logger_name = appcmdname
+
+    plugin_logger = logging.getLogger(f'{base_logger_name}.{plugin_name}')
     plugin_logger.setLevel(loglevel)
 
     plugin_logger.addFilter(EDMCContextFilter())

plug.py

@@ -203,12 +203,8 @@ def load_plugins(master):
                 # Create a logger for this 'found' plugin.  Must be before the
                 # load.py is loaded.
                 import EDMCLogging
-                if not os.getenv('EDMC_NO_UI'):
-                    base_logger_name = appname
-                else:
-                    base_logger_name = appcmdname
-                plugin_logger = EDMCLogging.get_plugin_logger(f'{base_logger_name}.{name}')
 
+                plugin_logger = EDMCLogging.get_plugin_logger(name)
                 found.append(Plugin(name, os.path.join(config.plugin_dir, name, 'load.py'), plugin_logger))
             except Exception as e:
                 logger.exception(f'Failure loading found Plugin "{name}"')