[FEATURE] Wordcloud module should remove 'stopwords' by default

[Fraukje]

The wordcloud module seems to do a simple word count and visualisation without any 'smart' additions. The most easy way to improve usability of a word cloud is to exclude stop words, see e.g. https://www.maxqda.com/blogpost/stop-word-lists for a nice blog post about this.

For example:
when I run the word cloud module on the HU's anonymized Exit questionnaire data I see:

[linear]

CED-27 [FEATURE] Wordcloud module should remove 'stopwords' by default