I would like to easily add a new sender to an existing gmail filter rule. For example, suppose I have a complex filter that operates based on a list of several senders. When I receive a newsletter from a new sender, I'd like to be able to easily add this new sender to the existing rule.
For now, I have to copy the sender's email address, click through the settings options to get to the filter, open the filter and paste the new sender into the list.
Is there an existing solution of any sort, to streamline the process of adding a sender to an existing rule, whether through scripting or other canned tool?