Grid lines should update when set to nil

[GoogleCodeExporter]

I have provided the user with an option to toggle the major grid lines on/off. 
When the user toggles them off, I set them to nil. This does not immediately 
cause the gridlines to disappear, though they do disappear after a plot is 
added (and presumably something in the background is causing the gridlines to 
be redrawn).

Setting the gridlines to another line style (non-nil) updates it immediately -- 
it's only when setting it to nil that it does not. I would prefer to be able to 
toggle the gridlines off by setting them to nil rather than by giving them a 
line style that is invisible (my current solution).

Original issue reported on code.google.com by Jason.S...@gmail.com on 25 Nov 2013 at 8:08

[GoogleCodeExporter]

Original comment by eskr...@mac.com on 26 Nov 2013 at 1:24

• Changed state: Accepted

[GoogleCodeExporter]

This issue was closed by revision b3d0dd3742aa.

Original comment by eskr...@mac.com on 26 Nov 2013 at 2:16

• Changed state: Fixed