popover arrow style

[luxzeitlos]

This is probably related to #368

Currently we specify arrow styles in out css but in a way so its never ever applied.

Because of that logic the arrow gets rendered with the style ember-popover-arrow not ember-tooltip-arrow.

However when we fix this things get interesting:
The arrow looks horrible. Its basically just white hiding the border there, not actually showing an arrow.

Shouldn't we either a) fix this or b) remove the arrow scoresheets for popovers altogether?

[andycochran]

This is addressed in #370.

[maxfierke]

#370 has been merged