Manifold Learning is not compatible with Annotated Corpus Map

I noticed that t-SNE is used in the help example before Annotated Corpus Map to reduce dimensions, PCA and MDS can also be used but not Manifold Learning. Why not allow it?

OS: Windows 10
Orange: 3.37.0

Start with the help example that places t-SNE before Annotated Corpus Map, then inspect how Annotated Corpus Map accepts dimensionality-reduction outputs and how PCA and MDS are recognized. Confirm why Manifold Learning is excluded and verify that the example and compatibility behavior support it without breaking the existing reducers.

Written by the indexing model from the issue text.