false for FormText

Changes the algorithm in FormTextModel so that the normalization of
whitespace works as described in the javadoc of method
setWhitespaceNormalized() in FormText. Added unit tests to prove that
the new algorithm works as designed.

Change-Id: Ie0444e512c8c19d00bddd4a5b239a027eba72a40
Signed-off-by: Ralf M Petter <ralf.petter@gmail.com>