Setting widget expanded

[eriktks]

Issue

Continuing the work of Flavio Hafner on issue #14 in PR #33 in making a widget that determines the setting of a text

Description of changes to setting widget

• added progress bar
• code refactoring
• replaced lemma output by event+location+date output
• made possible inclusion of additional entities list
• select most frequent of generated three entities
• visualize text analysis
• use additional data from WikiData

Future work (create new issue for this)

• use prepositions that indicate the setting:
  https://e-ans.ivdnt.org/topics/pid/topic-15174778691463560 gives the prepositions of place
  https://e-ans.ivdnt.org/topics/pid/topic-15428093371166213 the propositions of time

Includes

• Code changes
• Tests
• Documentation

[ThijsVroegh]

I ran the code and inspected the code changes. The setting widget runs well, and the option to select an entity list also works as it should. The datatable with the selection of main setting aspects per story was also inspected and looks good.