Fix table rendering when table has background style property instead …

[advapiIT]

…of background-color

Updated project to VS 2017

[onizet]

Hello @advapiIT, sorry for late reply! I quite agree with your fix however, I would prefer a real parsing of "background" because your implementation is a bit naive and will not parse more elaborate style. See https://www.w3schools.com/css/css_background.asp for sample.

Other remarks, if you do a PR, please include only the file that should be updated, and not the csproj, sln and so on.