Revert "use get_property"

This reverts commit 08d7db8.

tests/selenium/test_geojson_selenium.py

@@ -35,4 +35,4 @@ def test_geojson(driver):
     )
     assert control_label.text == "geojson"
     control_input = control_label.find_element(By.CSS_SELECTOR, value="input")
-    assert control_input.get_property("checked") is False
+    assert control_input.get_dom_attribute("checked") is None