Request: Option to make all links open in new window

All the links in my blog pages (well, 99% of them) are links to pages on external sites. I want them to open in a new page. So I repeat this procedure five or six times per blog post:

1. Highlight the link text
2. Click link icon
3. Paste or type external URL
4. Click cog
5. Enable 'Open in New Window' option
6. Click Save
7. Click Apply

Instead, it would be great if I could set a site preference to open all URLs in a new window unless it's recognised as an internal site link. That would save me 4 or 5 steps per link.

If you share link to blog page, I think we can use some JavaScript code to create this setting.