Feature/update viz setting and widgets

[sudan45]

Addresses:

• https://github.com/the-deep/server/pull/1393

This PR includes changes from

• https://github.com/the-deep/server/pull/1425
• https://github.com/the-deep/server/pull/1412

This PR doesn't introduce any:

• [X] temporary files, auto-generated files or secret keys
• [X] n+1 queries
• [x] flake8 issues
• [x] print
• [x] typos
• [ ] unwanted comments

This PR contains valid:

• [ ] tests
• [ ] permission checks (tests here too)
• [ ] translations

[sudan45]

@AdityaKhatri dai and @subinasr lets test together on alpha 1 server