Multiple ranges bugfixes

[Geegee]

Bugfix to the recently merged mutliple_ranges_odmr.

Description

A list was not properly resetted between different ODMR runs.

Motivation and Context

Making the ODMR Gui usable again.

How Has This Been Tested?

Check on dummy configuraton.

Screenshots (only if appropriate, delete if not):

Types of changes

• [ x] Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project.
• I have documented my changes in the changelog (documentation/changelog.md)
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added/updated for the module the config example in the docstring of the class accordingly.
• I have checked that the change does not contain obvious errors (syntax, indentation, mutable default values).
• I have tested my changes using 'Load all modules' on the default dummy configuration with my changes included.
• All changed Jupyter notebooks have been stripped of their output cells.

[NicolasStaudenmaier]

Probably my bad not having it noticed. Thanks for immediate correction.