Demos and examples aren't working?

[ittikorns]

I was trying to figure out why drag and drop table rows doesn't work on my site. Then I come back and check the demos again and it seems like it doesn't work as well.

http://angular-ui-tree.github.io/angular-ui-tree/#/table-example

When you drop the element it just go back into the same order.

[zachlysobey]

No idea how to fix, but I think I can write a e2e test to confirm this as broken and prevent future regressions.

[StefanCodes]

Argh, that was caused by #589 - my bad.
The problem is that beforeDrop only passes (and thus processes the drop event) when the caller code implements the beforeDrop callback and return truthy.
Right now if it's not implemented, ui-tree will assume the drop event was rejected and undo the drop.

I can submit a PR for this tonight. Sorry, that was sloppy.

[zachlysobey]

I tried to get an e2e test (#682) for this, but it's not working as expected...

[StefanCodes]

Submitted #683