Show a tooltip in pattern view when hovering over a slot.

[trusktr]

By "slot" I mean a cell in the table, the ones that contain a . when empty.

When hovering over a slot, a tooltip showing the column and slot info would be nice. The tooltip might show stuff like the column name, column description, datatype, current slot value, a range of acceptable values, etc. Some of the info in the tooltip would match that of the status bar that shows column info in pattern view (when a slot is focused/active/clicked).

Original: http://buzztrax.org/bugs/?do=view_issue&issue=67