Semantic Viewer: option with simpler matching

[ajdapretnar]

Is your feature request related to a problem? Please describe.
Often, users would be confused how the coloring of the document segments works. They would see a word that matches exactly to an input word, but it is not colored (due to the similarity being below threshold).

Describe the solution you'd like
Add another option to forgo embeddings and simply display segments that match any of input words. Similar to Corpus Viewer's search option, but where the segments are displayed (not an entire document).

Describe alternatives you've considered
Adding section viewer to Corpus Viewer (but then you need to know regex).