Fix the CSS issue of Import CSV screen

[harinij]

Is your feature request related to a problem? Please describe.
There are a few CSS issues on the Import CSV's second screen as shown below, with alignment and scrollbar that needs to be fixed

Describe the solution you'd like
Fix CSS issues as highlighted

[jmutt78]

I would like to work on this one.

[jmutt78]

Is this project participating in Hacktoberfest?

[harinij]

@jmutt78 yes, we have added the hacktoberfest label to the project and I have added the accepted label for your PR now. Thanks for contributing :)

[jmutt78]

@harinij Thank you! I really like this project :)