How to choose multi paths?
I vectorized an image and got a lot of paths that I want to unite to
one path per segment of a christmas tree image
(I got the answer how to unite here Vectorized image: Change many paths to one path with color gradients?.
My image with the first paths of a segment marked:

I choosed every path with a pressed shift key and left mouse click.
But the problem is that I missed some paths. I had to click unite
some times to see which paths I have missed and go back to choose
them with shift+left mouse click. I have five segments with about 20 paths
per segment so it's a solvable task to mark all paths.
But if I had 1000 paths it would be time-consuming to mark all
paths with shift+left mouse click.
So is there a possibilitiy that I can only mark the first and the last path
of a segment and the paths between are automatically marked
(but not the dark green outer path)?
