Ticket #1058 (closed defect: wontfix)

There are a couple of issues that the probe readout is having and I think they are related to tool delegation.

1) If you move the probe out of an image the last status event persists. If you do so very slowly it gets cleared. Putting print statements in PixelProbe show that the tool is not active when it could be. I have put in as much code as possible into PixelProbe to null out the status event area to no avail.

2) when moving the pixel probe slowly near the right and left edges you can see its inaccurate as to when it should quit being active. On the left you never get a clearing of the status event area. On the right you do for a couple pixels. Note that in this case the clearing seems to happen too early as there is still room on the right of the image. This may be a cursor drawing error rather than a delegation error. But delegation errors seem possible on the left edge.