Circular progress bar

[meschultheiss]

Description

La progress bar du milieu de la fenêtre apparaît de façon étrange :

Benchmarks

No response

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• [x] Read and agree to the Code of Conduct.
• [X] If there is already a relevant issue, whether open or closed, comment on the existing thread instead of posting a new issue.
• [X] I have included Runable example so the maintainer can troubleshoot the problems you identify.
• [X] I have included Minimal example so the maintainer can troubleshoot the problems you identify (reduce runtime wherever possible and remove complicated details that are irrelevant to the issue at hand).

[guilbep]

@pierreleripoll pour info! :)