There are too many options in the advanced detector to fit in with the
default GUI size. The scroll bar does not appear if not needed.

The main channel is 1-value, the secondary one is 0-valued, and
they cannot be larger than the number of channels cellpose accepts.

Also target version is 1.0.0

The other 3 detectors are currently broken.
And the non-GPU version does not work (one CLI instance but several
folders in which the images are saved...)

The reason was that the same instance of the cli was used in
all threads, each setting a different target folder to save the
images. Of course this led to race conditions.

The easy fix was to put the setting of the target folder and
the generation of the command line in a synchronized block.
Not neat but works.

It cannot work as is, without extra, inelegant gymnastics.
Mainly: how can we inform the CLI how many channels etc we have?
And the factory should not have any field!!

Only two classes. Nice!

I want to be able to specify another default value for
omnipose.