Storing netdiff toolcfg from netedit doesn't seem to work

[schwepmo]

I was playing around with netdiff and tried to save the toolcfg using the marked button.

Unfortunately, the configuration file is not created, or at least not in the selected directory and I can't seem to locate it.
Attached is a minimal network that contains the exemplary networks I was using
netdiff_test.zip

SUMO-version: 1.21.0

operating system: Windows 11

[namdre]

• netdiff.py uses unnamed arguments for source, dest, and outprefix whereas netedit tries to pass them as --original-net --modified-net --outprefix
• netdiff.py doesn't recognize the options --select-modified --select-added --select-deleted --load-shapes-modified --load-shapes-added --load-shapes-deleted which are only used in the context of netedit when loading netdiff results into the GUI. (the relevant netdiff.py options are --write-selections and --write-shapes)

Since the netdiff.py tool receives special handling among the tools (with custom options and loading of results) it's not obvious what the toolcfg should contain:

• options for running netdiff outside of netedit (this is easy to fix)
• or options for running netdiff from within netedit (in this case, a new mechanism is needed for writing options that netdiff ignores and netedit reads)

[schwepmo]

For my use case, being able to store the original and modified network as well as the outprefix would probably suffice. As the main nuisance was locating the networks every time I ran netdiff.

On another note, the outprefix options was a little bit confusing at first, since it isn't only a prefix but also excepts a path + prefix, which is convenient but not what I would've expected.