Selected time scrolltop fix (Hacker0x01#1396) (Hacker0x01#1454)

The scroll position of the selected time is calculated using a height of 30px in time.jsx --> this.list.scrollTop = 30 * (multiplier * currH);
 
However, the actual height of the time-list-item is 31px, so the scroll height is typically incorrect.

This change ensures the selected time-list-item will be scrolled into view

fixes Hacker0x01#1396

src/stylesheets/datepicker.scss

@@ -235,6 +235,7 @@
         box-sizing: content-box;
 
         li.react-datepicker__time-list-item {
+          height: 30px;
           padding: 5px 10px;
           &:hover {
             cursor: pointer;