Allow different backgrounds for downloaded SVG for the whole graph

[mohitkumartoshniwal]

Currently downloading of graph in svg works fine for white background but when a different background is used, only a part of the graph is covered. Make necessary changes such that graphs downloaded as svg can also have different backgrounds similar to png and jpeg.

[NielsNicolai]

Is the SVG download feature already included for the white background? If so, how can it be done?

[mohitkumartoshniwal]

@NielsNicolai The svg export currently only supports white background since I was finding some issues with regards to the graph visualization export not being completely covered with a different background, hence currently the task is to allow svg to have multiple backgrounds similar to png and jpeg without any issues.