Doesn't support box-shadow'ed tooltips

[cliffordfajardo]

Mostly created this issue for historical purposes of if people were looking for info
adding box shadows to this tooltip.

One thing to note:
This implementation of the tooltip with CSS only doesn't support box-shadows for older browsers that don't support css-filters unfortunately.

Older browsers (no css filter property support):

• create two triangle nubbins: (1) is used as the shadow (2) second is is overlayed on top. Example
  

Newer browsers:

• you can use CSS filters.