UMAP figures created without legends

[luiztauffer]

when label="motif" or label="community", the vame.visualization function generates the umap figures with datapoints colored according to their cluster, but these figures have no legend to indicate the clusters indexes.

[DrSRMiller]

There had been a colorbar legend, but the line of code to create it was located in the wrong place (within the session loop), causing nested legends that made the UMAP figure impossible to see. We may have commented it out instead of relocating it. I agree the color code should be specified in a legend, at either the motif or community level (whichever color code is being used for the data).