Updated test cli settings

Added theme key in test_cli_settings.py.

cli/tests/test_cli_settings.py

@@ -34,6 +34,7 @@ class TestSettings:
             "tor_bridges_use_meek_lite_azure": False,
             "tor_bridges_use_custom_bridges": "",
             "persistent_tabs": [],
+            "theme":0
         }
         for key in settings_obj._settings:
             # Skip locale, it will not always default to the same thing