Update web.py

add  remove_localstorage,refresh_page func

pywebio_battery/web.py

@@ -5,7 +5,7 @@
 from tornado.web import create_signed_value, decode_signed_value
 from typing import *
 
-__all__ = ['get_all_query', 'get_query', 'set_localstorage', 'get_localstorage', 'clear_localstorage', 'set_cookie', 'get_cookie',
+__all__ = ['get_all_query', 'get_query', 'set_localstorage', 'get_localstorage', 'clear_localstorage', 'remove_localstorage', 'refresh_page', 'set_cookie', 'get_cookie',
            'basic_auth', 'custom_auth', 'revoke_auth']
 
 
@@ -45,6 +45,16 @@ def clear_localstorage():
     return eval_js("localStorage.clear()")
 
 
+def remove_localstorage(key: str) -> str:
+    """Remove the key from user's web browser local storage"""
+    return eval_js("localStorage.removeItem(key)", key=key)
+
+
+def refresh_page():
+    """Refresh the current page"""
+    return eval_js("location.reload()")
+
+
 def _init_cookie_client():
     session = get_current_session()
     if 'cookie_client_flag' not in session.internal_save: