fix seperator color for in account dialog

Signed-off-by: Marcel Hibbe <dev@mhibbe.de>

app/src/main/res/layout/dialog_choose_account.xml

@@ -74,7 +74,7 @@
         android:layout_width="0dp"
         android:layout_height="1dp"
         android:layout_marginTop="4dp"
-        android:background="@color/controller_chat_separator"
+        android:background="@color/list_divider_background"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@id/statusView" />