Feature: replace existing URLs in Org document

First of all, thanks for this package. It's making my notes, which often include a lot of (lists of) links to articles and so on, a lot more readable.

I have quite a few notes which already include a number of plain URLs or URLs with a short version of the page title. To make these notes more readable I would like to automatically change their description to the title of the linked page. Instead of yanking each URL and calling `org-web-tools-insert-link-for-url`, it would be handy to have another command which looks at the URL under the cursor, and replaces it with a link that has the title of the page as its description. If the link already has a description it could simply replace the existing description.