After applying:

Sorry couldn't crop video

I'll answer that here to put some visuals.

This is before the patch, all fine, correct direction, but aligned to left:

Here we mirror the graphics of the Flickable:

And then we mirror back the graphics of the first item (I work on a small testing version):

We notice the order is reversed (becuase we already mirrored the whole flickable, and the Row is applying mirroring here, so it's double mirroring). That is why we disable the mirroring of the row:

And mirror the graphics of the other items (double mirroring again, but to our benefit):

I see.

How about playing with leftMargin of the Flickable to right-align it? Something along the lines of

leftMargin: Math.max(0, width - contentWidth)

In D9786#188720, @broulik wrote:

I see.

How about playing with leftMargin of the Flickable to right-align it? Something along the lines of

leftMargin: Math.max(0, width - contentWidth)

Well, that is actually great, and I was about to update the patch to have only the alignment fixing, but I found one thing.
While entering deep in the list and the flickable should start working (moves things because of space shortage), it doesn't. The items stay as they are currently without moving. I think I'm missing something but not sure. Since you know more can you check please? :)

Perhaps you could manually set contentX to an appropriate value after adding a breadcrumb. I think the issue is that Flickable internally is still left-aligned, so I would suggest meddling around with contentX

Looking good!