improve frontend

[YujiOshima]

Fix bug and little improve for UI
bugs

• Categorical parameter didn't be select range by drag at the parallel coordinate graph.
• Fail to link TensorBoard.

improves

• Get an overview of the models selected by the parallel coordinate graph.
• Improve visualization of the parallel coordinate graph.

Signed-off-by: YujiOshima [email protected]

[gaocegege]

I think I have no ability to review frontend code now, thus let us go ahead and invite some people has frontend background to be reviewers.

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gaocegege

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[gaocegege]

/hold

Does it WIP or done?

[YujiOshima]

@gaocegege Thanks. I agree we need frontend reviewer.
This is done. We can merge it.

[YujiOshima]

/hold cancel

[gaocegege]

BTW, could we have a new demo (gif or video) in README to show the new UI?