Default gridlines almost invisible on Windows Chrome

[wstevens]

I'm not even sure if they are there, although I can kind of see them where there is fill going on. Seems to only be the case on Windows Chrome.

I am a fan of the default gridlines and do not want to override it.

[wstevens]

I guess I should add this doesn't seem to happen all the time even on Windows Chrome.

It may be rare enough to warrant closing this issue.