Improve reliability of "self.set_value()"

Author: mdmintz

seleniumbase/fixtures/base_case.py

@@ -4093,6 +4093,8 @@ def set_value(self, selector, text, by=By.CSS_SELECTOR, timeout=None):
         if self.timeout_multiplier and timeout == settings.LARGE_TIMEOUT:
             timeout = self.__get_new_timeout(timeout)
         selector, by = self.__recalculate_selector(selector, by, xp_ok=False)
+        self.wait_for_ready_state_complete()
+        self.wait_for_element_present(selector, by=by, timeout=timeout)
         orginal_selector = selector
         css_selector = self.convert_to_css_selector(selector, by=by)
         self.__demo_mode_highlight_if_active(orginal_selector, by)