Copying from and to table headlines with direct assignment does not work

[numeredev]

DESCRIPTION

Describe the bug Copying from and to table headlines using the direct assignment TAB() = TAB() with corresponding indices does not work (because not yet supported). The whole application crashes. It will work, if it is not a direct assignment. This is a regression to #168, therefore not yet critical.

To Reproduce Steps to reproduce the behavior:

1. Create a table with some string values
2. Try to copy them to a target table's headlines
3. See error (crash)

Expected behavior Assignment works as expected

Screenshots If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: 10x64
• Version v1.1.6.2404x64

Additional context Add any other context about the problem here.

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DEVS' SECTION

ANALYSIS

The mentioned change broke many other features and has to be reworked to allow things like TAB(:,1) = TAB(1,:) again. We'll do that by abstrahizing segments of code to be able to return to the original branch again.

IMPLEMENTATION STEPS

(see also our Wiki for implementation guidelines)

• Implement the necessary changes in a new branch created here on GitHub
• Test your implementation

DOCUMENTATION STEPS

(see also our Wiki for further information)

• Update the changes log
• Add comments to your implementation
• Add Doxygen documentation comments
• Create or update the documentation articles (*.NHLP and *.NDB files, if needed)
• Update the language strings (*.NLNG files, if needed)

PULL REQUEST

• Create a pull request for your changes
• Fill out the template
• Assign @numere-org/maintainers as reviewers