data-quality

Describe the bug
data docs columns shrink to 1 character width with long query

To Reproduce
Steps to reproduce the behavior:

1. make a batch from a long query string
2. run validation
3. render result to data docs
4. See screenshot
   <img width="1525" alt="Data_documentation_compiled_by_Great_Expectations" src="https://user-images.githubusercontent.com/928247/103230647-30eca500-4

Currently lakeFS register openapi handlers and handle all specific routes.
In case of a call to /api/v1/test, the unknown path under the API prefix, the mux will serve the request by the UI handler and return a valid HTML (UI) page.

The expected behaviour is to return a non-2xx status code with JSON error - prefered the internal error format, so the developer will handle an error and not fai

When trying to log a list of dictionaries like this:

to_send =  [
            {
                "residual": None,
                "timestamp": 1553004853455
            },
            {
                "residual": None,
                "timestamp": 1553004853662
            },
            {
                "residual": None,
                "timestamp": 1553004853868
            }

https://www.figma.com/file/yiL1CRyHsOEeY45NesWdiC/Provectus?node-id=123%3A2391