commit 811b04469efe730286a980b938b2ba1602c4d758
Author: Leszek Koltunski <leszek@koltunski.pl>
Date:   Fri Apr 3 23:19:28 2020 +0100

    More support for the 3x3x3 Solver.

diff --git a/src/main/java/org/distorted/uistate/RubikStateSolution.java b/src/main/java/org/distorted/uistate/RubikStateSolution.java
index 6fe64718..fa8bc8be 100644
--- a/src/main/java/org/distorted/uistate/RubikStateSolution.java
+++ b/src/main/java/org/distorted/uistate/RubikStateSolution.java
@@ -163,7 +163,10 @@ public class RubikStateSolution extends RubikStateAbstract
 
   public void savePreferences(SharedPreferences.Editor editor)
     {
-    mBackButton = null;
+    mBackButton= null;
+    mPrevButton= null;
+    mNextButton= null;
+    mMovesText = null;
     }
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
diff --git a/src/main/java/org/distorted/uistate/RubikStateSolver.java b/src/main/java/org/distorted/uistate/RubikStateSolver.java
index 33579e0f..aa34f4d0 100644
--- a/src/main/java/org/distorted/uistate/RubikStateSolver.java
+++ b/src/main/java/org/distorted/uistate/RubikStateSolver.java
@@ -197,6 +197,7 @@ public class RubikStateSolver extends RubikStateAbstract
     {
     mColorButton = null;
     mBackButton  = null;
+    mSolveButton = null;
     }
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////