make scroll easy to use, and better align.

[zhaolc90]

change Select for a better user experience

after click, the select one will go top of list.

forked suggestion commit

[HemalR]

Not a bad idea.

Ps - I notice you also have the horizontal scrollbars that I was getting (not present in the demos). Modifying the class .rc-time-picker-panel-select to add overflow-x: hidden; will fix this...