Convert single paragraph to lines using static sentence length

[schu96]

Translated text is currently displayed all together in a single BRlineElement, which prevents the existing text selection protections from working as intended.

To ensure that text selection does not exceed the protected limit, the entire translated paragraph is split by space characters. Sentence strings are then re-created to be no longer than 20 words (was an arbitrary number but 15-20 words seems to be the recommended average across multiple content / styling guides)

Also includes some CSS styling changes to prevent line breaks between sentence fragments/chunks

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.43%. Comparing base (970f0c9) to head (10ec5b2).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1453   +/-   ##
=======================================
  Coverage   69.43%   69.43%           
=======================================
  Files          62       62           
  Lines        5329     5329           
  Branches     1155     1155           
=======================================
  Hits         3700     3700           
  Misses       1594     1594           
  Partials       35       35           

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