Adding "Info" button and documentaion for a node.

 From:  bemfarmer
9518.16 
Updating the Info *.html file for a node is not working.
The old *.html Info file keeps coming up in nodeeditor, even if the file is deleted.
It was working just fine a day ago... I only made a few minor changes...
Maybe a cache need clearing?

- Brian

Reboot of computer did not help.
Closing MoI4beta did not help.

EDITED: 25 Oct 2019 by BEMFARMER