This PR adds support for drawing vectors and error bars for vispy scatter layers. The drawing of the lines is done in the MultiColorScatter to work with multiple layers and reuse the existing masking and coloring work. This PR also adds some tests to make sure that vector and error bar properties in the layer state can be written to and then read from a session file.
This PR adds support for drawing vectors and error bars for vispy scatter layers. The drawing of the lines is done in the MultiColorScatter to work with multiple layers and reuse the existing masking and coloring work. This PR also adds some tests to make sure that vector and error bar properties in the layer state can be written to and then read from a session file.