add the possibility to define a default counterController for a bliss controller added in default chain

Resolve "esrf_undulator bug on config reading if using "undu_prefix""

Closes #2847

See merge request !3841

mkdocs: Set bare site_url

Closes #2846

See merge request !3840

pm600.py: reset() method also clears trajectory_prog cache

See merge request !3828

Resolve "add scan property to sequence object"

Closes #2819

See merge request !3794

Resolve "Add Eurotherm 2704 controller"

Closes #2817

See merge request !3789

Resolve "Newport XPS: start_all limited to groups of one or two motors"

Closes #2837

See merge request !3824

CI: Fix dangling test in settings

Closes #2561

See merge request !3809

fix typo in speedgoat dll loading fix.

See merge request !3822