Feature Idea: Tweak hyperparams for algorithms, like in TensorBoard

[ch-sander]

https://projector.tensorflow.org/?_gl=1*9vvoxg*_ga*MTIzMDcxODYuMTc1MjY0NTY3Mg..*_ga_W0YLR4190T*czE3NTI2NDU4NjYkbzEkZzAkdDE3NTI2NDU4NjYkajYwJGwwJGgw

This well known tool allows to set settings for UMAP/tSNE. Maybe including this here make it a better competitor?

[ch-sander]

also "Nearest points in the original space" is nice to have (if selecting one item)