* NodeGraph: Detect dataframes more accurately based on fields
* Make get fields case insensitive
* Update node graph docs
(cherry picked from commit 939a778111)
* Moved Visualizations folder one level up. Fixed a bunch of broken relrefs.
* More broken relrefs.
* Fixed the last of the broken relrefs
* Adjusted weight and added alias.
* Added aliases to a bunch of visualization topics.
* More topics with aliases.
* More aliases, adjusted some weight and other metadata information.