Adds dispose to TextEditingController

[vicenterusso]

Fixes #445

[remonke]

I suggest you only dispose only if the controller is not provided in the widget.

Just simply add

if (widget.textController == null) {
  //
}

[vicenterusso]

At this point, inside _ReactiveTextFieldState class, textController is not nullable

[remonke]

widget refers to the widget, ya know, this thing extending the StatefulWidget class, not State. In initState you either use textController from this widget or initialize it. I suggest you only dispose the one initialized in the state, and if it's externally provided, leave it alone.

[vicenterusso]

That makes total sense!

[joanpablo]

Hi @vicenterusso, thanks for the contribution.
It seems to be an issue with the patch though, can you check what is failing before I can take a look? Thanks in advance.