Change d060b6f04f introduced some
new properties to QTextFormat which were unfinished and did not
match the documentation in the same change. I've updated the API
and docs to use the regular QFont enum for letter spacing type
instead of introducing bools (which inhibits expansions later)
or mutually exclusive properties in the text format.
Change-Id: Ife44993b6746c413e421fdaf92ebaaab6ba95977
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
4712d88c0e