How to move tasks and columns that are on the same level?

[donfour]

I'm building a todo manager similar to the one from the egghead course.

One tweak I'd like to do is for there to be independent tasks (i.e. tasks that do not belong to any columns).

I'd like to:

1. reorder independent tasks and columns as if they were all columns (easy to do)
2. add an independent task to a column by dragging it in, and also setting its position within the column in the same drag motion
3. removing a task from a column by dragging it out, and also setting its position in the same drag motion

Basically, the drag-n-drop example from @atlaskit/tree.

Currently combine seems to be my closest bet, but it doesn't seem to support the index-setting aspect of my problem.

I'm aware of #1001 but my columns don't have to be deeply-nested. There're only 2 levels (i.e. inside a column and outside a column). Is it possible for me to workaround the issue without the library supporting the feature natively?

Would appreciate it a lot if someone can point me in the right direction!!