Fixes janky drag and drop behavior and updates the styling of the drag
handle focus.
The solution uses the same method to prevent oscillation as we do for
strategies. To get access to the same context, I've added some extra
parameters to the OnMoveItem function and passed along the extra data
from the `useDragItem` hook. No new information, just making more of it
available, and turning it into an object so that you can declare the
properties you need (and get rid of potential wrong ordering of
drag/drop indices).
For the drag and drop behavior: If the dragged element is the same size
or smaller than the element you're dragging over, they will swap places
as soon as you enter that space. If the target element is larger,
however, they won't swap until you reach the drag/drop handle, even if
they could theoretically switch somewhere in the middle. This appears to
be a limitation of how the drag/drop event system works. New drag events
are only fired when you "dragenter" a new element, so it never fires
anywhere in the middle. Technically, we could insert more empty spans
inside the drag handle to trigger more events, but I wanna hold off on
that because it doesn't sound great.
When dragging, only the handle is visible; the rest of the card stays in
place. For strategies, we show a "ghost" version of the config you're
dragging. However, if you apply the drag handle to the card itself, all
of it becomes draggable, but you can no longer select the text inside
it, which is unfortunate. Strategies do solev this, though, but I
haven't been able to figure out why. If you know, please share!
Before:
After:
Fixes a small bug that caused the item to be draggable when clicking
outside of the handle, when using a handle. Basically resets the
draggable state when (re)entering the container.
