Enables importing Ink-ripple module

[aleksandar-b]

I had an issue with setting <Ink /> Component as a child of <Tab /> component because ripple effect did not stretch to full width and height. The children were not expanding to full width and height. So I changed some CSS (remove padding) and put some flex properties in order to center it.

The <Ink /> component is from react-ink npm package https://github.com/vigetlabs/react-ink

The changes do not affect anything and all works fine without Ink component.