Add "get_active_element_css()" to the SeleniumBase API

Author: mdmintz

help_docs/method_summary.md

@@ -418,6 +418,8 @@ self.disable_beforeunload()
 
 self.get_domain_url(url)
 
+self.get_active_element_css()
+
 self.get_beautiful_soup(source=None)
 
 self.get_unique_links()

seleniumbase/fixtures/base_case.py

@@ -6129,6 +6129,9 @@ def get_domain_url(self, url):
         self.__check_scope()
         return page_utils.get_domain_url(url)
 
+    def get_active_element_css(self):
+        return js_utils.get_active_element_css(self.driver)
+
     def get_beautiful_soup(self, source=None):
         """BeautifulSoup is a toolkit for dissecting an HTML document
         and extracting what you need. It's great for screen-scraping!