Consider adding an option to disable `enableSlowWholeDocumentDraw`
`enableSlowWholeDocumentDraw` was added to make saving a webpage image work. https://redmine.stoutner.com/issues/187
However, there is at least one website that doesn't work with this feature (most of the bottom of the website is rendered as a gray box). I am not sure what aspect of the website causes it to happen, because this is not common. The only website I know of with this problem is:
It would be possible to create an option to not call `enableSlowWholeDocumentDraw`, which would disable saving websites as images, but I an not certain I want to do that unless there are a number of websites that have issues with it. I am more inclined to consider it a bug in the webpage and encourage the webmaster to fix their design.