Wait for button is present before continuing test

[kbeaugrand]

Description

What's new?

• fix Bug: CI sometime failed during unit tests #343 - Wait unit a button is present before continuing a test

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Tests
• Other

[codecov]

Codecov Report

Merging #345 (849f73b) into main (80a7bcc) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #345   +/-   ##
=======================================
  Coverage   41.89%   41.89%           
=======================================
  Files          99       99           
  Lines        2886     2886           
=======================================
  Hits         1209     1209           
  Misses       1677     1677           

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