Add Panning

[hasn0life]

I'm not sure if this has been suggested before but would it be possible to add the ability to pan the graphs by dragging the mouse when they're zoomed in? I'm pretty sure this is a common feature and I'm surprised it's not implemented in this library (or maybe it is and I haven't found it?) Thanks!

[alex-hhh]

There is no support for panning in the plot library and adding support for it would require a decent amount of work.