Make cancel button gone initially

mailbox-android/src/main/res/layout/fragment_startup.xml

@@ -52,10 +52,12 @@
         android:layout_height="wrap_content"
         android:layout_margin="16dp"
         android:text="@string/cancel"
+        android:visibility="gone"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@+id/statusDetail"
-        app:layout_constraintVertical_bias="1.0" />
+        app:layout_constraintVertical_bias="1.0"
+        tools:visibility="visible" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>