Improve mobile text actions activation and remove TapHanlders from TextField and TextArea
Now the text actions should only appear onPressAndHold instead of staying constantly open. It's still impossible to dismiss though.
The tap handlers were unnecessary since the same things could be done using just the pre-defined onPressed and onPressAndHold signal handlers and the TapHandlers can conflict with custom behavior that app developers might want to use.
@teams/vdg since this affects the UX