HWRCs without a name

[JackGilmore]

If an HWRC doesn't have a "name" tag it can show up blank on some of the pages. We should have a suitable substitute or "default" name

[JackGilmore]

Adding bug label to this as it causes the map render to crash at the moment because of this line in map.js

var idPrefix = centreProps.name.replace(/^[^a-z]+|[^\w:.-]+/gi, "");