image-manipulation

Describe the bug
If you resize the window, onCropComplete fires.

To Reproduce
Steps to reproduce the behavior:

1. Go to this codesandbox
2. Put a console log in the the onCropComplete
3. Resize the window
4. Notice console logs with what seems like with no debounce

Expected behavior
Not expecting o

This extends upon #141 where we can now drag to rearrange layers in the layer panel and insert between other layers. But if a folder is empty, it isn't possible to insert between any children of that empty folder, so it's impossible to put it in that layer (without resorting to cut/paste). This should be altered to allow inserting the dragged layers into a folder itself, in addition to inserting b