fix ripple: disable animation once finished

Once a ripple has been clicked, the "ripple--is-animated" class stayed on the element.
Thus, if we redisplayed the element (like reopening a dialog), the ripple animation restarted.
By removing it after a timer, the ripple does not repeat once finished.
fix data-table: fix cells paddings and add responsive behaviour

Before, there were no padding for TH and TD cells. There is now a 16px padding for TD and TH. Data tables have also a responsive behaviour.
chore demo: data-table demo updated with padding fix and responsive

Data-table demo has been updated with padding fix and responsive
behaviour.