Investigate field-level help

It would be very helpful to offer field-level help for the UI buttons and for column headers - either by mouse over or some icon. This is much more convenient for basic definition of functions and data as compared to linking to external wiki or other pages. I hope that there is something already available in the Electron domain - not suggesting that we write this feature on our own.

I searched the Electron doc pages, but did not find anything. It could be there under more Electron-precise terminology - I searched for "field help".