feature request: hover help/tooltip text

[Todd Chambery <chambery dev gmail com>]

Hi all,

I'm sure you have plenty on your plate, but a feature a I think would be 
useful:

   Hover help/tooltip text

I have some large diagrams with lots of notes, many of which are 
definitions.  They're important for saving me from flipping to the data 
dictionary, but tend to clutter the diagram as a whole.  It would be 
helpful to attach a tooltip to these texts (or any widgets) that would 
only appear when the mouse is hovered.  These tips could be indicated by 
an underline or glow, and would not show up on the exported/printed diagram.

What do you think,

Todd