added cli switch to turn off theming

grum/cli.py

@@ -10,9 +10,12 @@ from .mdi import MDIWindowMode
 
 def main():
     app = QApplication(sys.argv)
-    theme.apply(app)
     ctrl_c.setup(app)
+
     clargs = handle_clargs()
+    if not clargs.pop("no_theme"):
+        theme.apply(app)
+
     mw = MainWindow(**clargs)
     mw.show()
     sys.exit(app.exec())
@@ -25,10 +28,11 @@ def handle_clargs():
     parser.add_argument("-H", "--host", default="localhost", help="Server host name")
     parser.add_argument("-P", "--port", default=8000, type=int, help="Server port number")
 
-    parser.add_argument("-e", "--examples", dest="add_examples", action="store_true", help="Add example data")
-
     parser.add_argument("-w", "--window-mode", default="multi", choices=MDIWindowMode.values(), type=unambiguous_window_mode, help="Set the initial window mode")
 
+    parser.add_argument("-e", "--examples", dest="add_examples", action="store_true", help="Add example data")
+    parser.add_argument("--no-theme", action="store_true", help="Disable theming")
+
     return parser.parse_args().__dict__