to fix packaging issue with 1.8.1

See merge request nexedi/slapos.core!414

See merge request nexedi/slapos.core!413

   The transition should be excessively called since it creates an entry on workflow history. So we could skip the expensive call by pre-checking before all it, rather then let the API skip itself.

See merge request nexedi/slapos.core!412

   The fixit wasnt a good idea, since we cannot guarantee that the data will be complaint (and not changed by the administrator).

    Move Constraint from event to Support Request, since indexation might not find the Support Request while create the first ticket.

See merge request nexedi/slapos.core!411

    Fixup condition, since script always return a list-like

See merge request nexedi/slapos.core!410

   This can lead to potential xss attack (unrealistic, but still a security flaw).

   It is required to call render on the gadget.

See merge request nexedi/slapos.core!409

    Dont hardcode the slapos gadget everywhere
    Use service list rather then dashboard as frontpage

From python3.8, platform.platform() changed the output:

$ python3.7 -c 'import platform ; print(platform.platform())'
Linux-5.10.0-16-amd64-x86_64-with-debian-11.4

$ python3.8 -c 'import platform ; print(platform.platform())'
Linux-5.10.0-16-amd64-x86_64-with-glibc2.2.5

See merge request nexedi/slapos.core!408

   Assignments dont expire anymore on this site.

See merge request nexedi/slapos.core!407

    Handle non string values.

  This fixed badly merged nexedi/slapos!394, that contained rebased commits

See merge request nexedi/slapos.core!394

See merge request nexedi/slapos.core!393

    This help for UI tests be a bit translation independent.