This commit touches the way words are broken in wp subjects, descriptions,
custom fields, and activity messages.

Previously, words would get broken randomly at the end of a line. This
behaviour is now improved. Words tend not to get broken unless there is
no space at all for the word to fit on a line without being broken.

However, this commit does not enable hyphenation for these places,
because `hyphens: auto;` causes the browser to break words more
aggressively.

Co-authored-by: bsatarnejad <b.satarnejad@gmail.com>