TensorBoard Projecter: individual mugshots are blurry

[JohnTigue]

Seems Projecter doesn't know how to scale up 24x24 images (derp). So the ones were passing in look blurry. Simply make bigger one to pass in:

• Will not affect UMAP
• Might stress out some low end GPUs, dunno.

[JohnTigue]

Max sprite size is (8192, 8192). Punks is (2400, 2400) so we could make them at least 3x bigger, and so less blurry.

[JohnTigue]

See also https://github.com/Sparklewerk/hypermap/issues/10#issuecomment-1047302776