[2.0.0-beta4] FieldFormatterSource: some settings are not saved

i am still on it.

This one took me a lot of time, debugging and thinking. And finally, it seems to be there and working.
it solves a long-time side effect of incomplete submitted values in ui patterns 2' forms.

the best example is to take like a fieldFormatter with a boolean option, being true by default. it was impossible to save the false value.
now it is possible and much more!
WE need this so much :)..
Take any site configured with ui patterns 2. resave a component form, and look at the config.
the magic seems to happens now hahaha

please review, christian ? Pierre?