My name is Alex, I'm a guru here at Shopify!
While the process can't be made 100% automatic, you can speed up editing the handles rather than having to go into the settings for each page by using the bulk editing feature! Our guide on this is oriented towards products, but the feature applies to pages as well. Just head in your admin to online store > pages and click on the checkbox next to any page you'd like to update. Then select the 'edit selected items' option that appears:
Next, you'll add a field for the URL and handle:
This will let you change those handles much more quickly!
Hope that's helped! Please feel free to let me know, and you can always give us a call or start a live chat at any time. We're open 24/7 for your convenience and always happy to assist!
Alex | Shopify Guru