- Addition of a null item at the end of the combo box displaying the files. the null item is  selected when  an invalid file has been chosen by the user.

Signed-off-by: Technical User <dct.techuser@gmail.com>

The Discourse software updated the tags path from /tags/ to /tag/.

* Feature : new range of possible values and format for the Surface Min size parameter
* Feature : version number as variable
* "Serialization format" issue fixed
* Correction after code inspections
* Dependencies version upgrade

Signed-off-by: Jean-Yves Tinevez <tinevez@pasteur.fr>

Signed-off-by: Jean-Yves Tinevez <tinevez@pasteur.fr>

- serialization

- use of Fiji via context
- Enable classification slider when no input
- removal of dots in parameter file