Use country name instead of 2-letter code in Author sidebar

I was going to submit an issue for this, but figured I should have a go at doing it.

> In the sidebar, if the Location is showing a flag, the tooltip text is the 2-letter ISO code for the country, instead of the name. I think it should be the name.

**Note** I haven't tested this change at all. I'm not at all familiar with the codebase, so I realised this may not be at all the right way (ie how you would do it) to make the change, hence the quick hack pull request.

Cheers,
Neil