ionic2 enhancement(popover) - hide arrow when there is no target

[zakton5]

Short description of the problem:

When there is no event passed to nav.present, the popover will appear in the center of the page with the arrow pointing to whatever is under it.

What behavior are you expecting?

I would like the arrow to be hidden if no event is passed in.

Steps to reproduce:

1. Create a popover and present it without passing in an event. Notice the arrow.

Other information: (e.g. stacktraces, related issues, suggestions how to fix, stackoverflow links, forum links, etc)
This could either be implemented as default behavior or as a user option that is passed in to Popover.create()

Which Ionic Version? 2.x

[brandyscarney]

Thanks for the issue! This will be fixed in the beta 9 release. 😄