closeEditing method
Closes the editing if any.
Implementation
void closeEditing() {
final bool hadFocus = edit.value?.field.focus.hasFocus == true;
edit.value?.field.focus.removeListener(_stopTypingOnUnfocus);
edit.value?.onClose();
edit.value = null;
if (!PlatformUtils.isMobile && hadFocus) {
send.field.focus.requestFocus();
}
}