Fixing using controller's value as initial value

[muccy-timeware]

If you initialize the field with an empty controller and you update its value too soon, you end up having a filled field that failed required validation.

This fix uses controller.value (if any) during initialization pretty much like TextFormField does.

[cedvdb]

Could you change the format back on the line that changed ? I think you have a bigger line length than 80.

If possible add a test too so this does not break in the future

[muccy-timeware]

Done.
I hope the test is good because I never wrote a UI test before, honestly

[cedvdb]

Perfect thank you.

Released in v9.0.5