Save fit in ranges

[Geegee]

Previously -1 was introduced as an indicator for all ranges combined.
Now this is followed through the whole tool chain.

Description

This includes:
- saving
- display of the whole matrix range
Additionally some clarifying tool tips were added.

Motivation and Context

This should bring as added benefit the changes intended in #681

How Has This Been Tested?

On dummy. I tried saving under different scenarios. Certainly not exhaustive.

Screenshots (only if appropriate, delete if not):

Types of changes

• 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.