improve(node status): add 'download pem' and 'pool error' better format

A few things that really bothered me in the UI.. 

The "pem file" - I added a link to download it, and a link to "display" it without \n characters.. easier for copy/paste. 

The "error", I made it support in different formats - some are for backward compatibility and some for future formats (see modules pull request).