Topic modelling - temporarily fix gensim to 4.1.2

[PrimozGodec]

Issue

Temporarily fixes #820 until Gensim provides a solution

Description of changes

• Fix Gensim to version 4.1.2 - which is the last version where coherence still works
• Temporarily remove random seed for LSI since it is not compatible with 4.1.2
• Change the use of buttonClicked signal to be compatible with PyQt6

The first and second changes should be reverted when Gensim fixes CoherenceModel the last one should stay.

Includes

• Code changes
• Tests
• Documentation

[PrimozGodec]

#886 will fix the issue of failing tests. This PR should be rebased when the fix is merged.

[PrimozGodec]

/rebase

[IzaClaro]

Issue

Temporarily fixes #820 until Gensim provides a solution

Description of changes

• Fix Gensim to version 4.1.2 - which is the last version where coherence still works
• Temporarily remove random seed for LSI since it is not compatible with 4.1.2
• Change the use of buttonClicked signal to be compatible with PyQt6

The first and second changes should be reverted when Gensim fixes CoherenceModel the last one should stay.

Includes

• Code changes
• Tests
• Documentation

Hi! I am having this same problem when using the widget Topic Modelling. I have been reading the discussions about this issue, and came across this solution. Now, please, how do I this:
«* Fix Gensim to version 4.1.2 - which is the last version where coherence still works

• Temporarily remove random seed for LSI since it is not compatible with 4.1.2
• Change the use of buttonClicked signal to be compatible with PyQt6»