Optimize the sign_up_tip

Author: kerwin612

options/locale/locale_en-US.ini

@@ -421,7 +421,7 @@ remember_me.compromised = The login token is not valid anymore which may indicat
 forgot_password_title= Forgot Password
 forgot_password = Forgot password?
 need_account = Need an account?
-sign_up_tip = You are registering the first account in the system. Please carefully remember your username and password, as losing this information could cause significant inconvenience later.
+sign_up_tip = You are registering the first account in the system, which has administrator privileges. Please carefully remember your username and password, as forgetting these credentials may require system reset and reinitialization.
 sign_up_now = Register now.
 sign_up_successful = Account was successfully created. Welcome!
 confirmation_mail_sent_prompt_ex = A new confirmation email has been sent to <b>%s</b>. Please check your inbox within the next %s to complete the registration process. If your registration email address is incorrect, you can sign in again and change it.