UI: Autogenerate yaml previews

[richardsliu]

On the experiment creationg page, the changes I made in the Parameters tab are not reflected when I switch to "YAML", and vice versa.

We should allow the user to preview the generated yaml if possible.

[gaocegege]

Do not think we can implement it before 0.7

I have no idea about how to implement it.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[andreyvelich]

/lifecycle frozen

[andreyvelich]

That was implemented in: #1427.