Tooltip on the generated indicator

[ahillman3]

A nice to have. If you could have a tooltip pop up when hovering over the generated pieces, to indicate what they are, fully spelled out.
e.g. 'PHP Model' over the PM.

This could also be used to give further information, in addition to a color difference, as to what the difference is.
e.g. 'Column foo found in model, not in generated code.'
'Column bar type changed from Date to TIMESTAMP'

Useful info on hover.