Drop not working when draggable is nested within a drop zone

[bjovanovic84]

• I'm submitting a ... [x] bug report [ ] feature request [ ] question about the decisions made in the repository

• Do you want to request a feature or report a bug?

• What is the current behavior? Drop functionality doesn't work when draggable item is nested within a drop zone.

• If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem via https://plnkr.co or similar. https://plnkr.co/edit/T2DT3AboJG225ttCOHaD

• What is the expected behavior?

• What is the motivation / use case for changing the behavior?

• Please tell us about your environment:

• Angular version: 2.X.X

• Browser: [all]

• Other information (e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, eg. stackoverflow, gitter, etc)

[rmoscowitz]

@bjovanovic84 nice job with your PR! I think your change will also fix #164 and #174.

[abhishekdgeek]

@akserg I think we can mark this as closed.