Feature request: Clone overlap handling: Clone Union, Difference, etc.

[seaprogrammer]

Clones are useful, but there seems to be no way to handle their overlap such that a single outline is present, without unlinking the clones of course.

Ex. 1. You make a half of a heart and clone it for the other side.
Ex. 2. You're a biologist making outlines of butterflies (and would like to continue modifying the shapes one after another).

I'm not sure how the Inkscape coding layers are handled, but allowing a Union, Difference, etc. for overlapping clones would be useful.
Maybe you'd have to insert some fake non-modifiable corner ndoe into the joined paths. Perhaps this entire feature can be implemented more readily by implicitly creating a clone of the original object such that it's easier to, ex. Union them all. Again, I'm unfamiliar with Inkscape's internal coding.

In the future, an additional option might be to allow either (1)Corner (default) or (2)Smooth joins (with, ex., minimum radius). The later would reduce on the difficulty of the user to align the paths, but for now the alignment tools should be able to handle this fine and the complexities of handling anything other than corner joins is not appealing.

Another related option for this feature:
[X] Use path's join settings for overlap corner points.