Benchmarks/Support for large numbers of points

As per the Teams convo, making a few issues here.

Multiple (some potential) clients have looked for graph solutions that can handle upwards of 5000 points. 

QtCharts can handle this, if OpenGl is enabled, Area Charts aren't used, and points aren't to be selected, etc. (OpenGL also comes with other limitations).

It would be ideal if GPU support was enabled by default.
Even if it isn't, we need to handle points better/optimize for larger data:

• Joining points if zoom is far enough (batched draws?)
• Not processing points that are out of view (scrolling with a dataset of 10000 points but only 2 visible points shouldn't be as laggy as scrolling with 10000 visible points)
• etc