Small layout improvement

app/src/main/java/eu/faircode/email/FragmentPro.java

@@ -58,7 +58,6 @@ public class FragmentPro extends FragmentBase implements SharedPreferences.OnSha
     private CheckBox cbHide;
     private TextView tvList;
     private Button btnPurchase;
-    private ImageView ivExternal;
     private TextView tvPrice;
     private TextView tvGoogle;
     private TextView tvNoPlay;
@@ -88,7 +87,6 @@ public class FragmentPro extends FragmentBase implements SharedPreferences.OnSha
         cbHide = view.findViewById(R.id.cbHide);
         tvList = view.findViewById(R.id.tvList);
         btnPurchase = view.findViewById(R.id.btnPurchase);
-        ivExternal = view.findViewById(R.id.ivExternal);
         tvPrice = view.findViewById(R.id.tvPrice);
         tvGoogle = view.findViewById(R.id.tvGoogle);
         tvNoPlay = view.findViewById(R.id.tvNoPlay);
@@ -189,7 +187,8 @@ public class FragmentPro extends FragmentBase implements SharedPreferences.OnSha
         btnBackup.setVisibility(View.GONE);
         cbHide.setVisibility(View.GONE);
         btnPurchase.setEnabled(!play);
-        ivExternal.setVisibility(play ? View.GONE : View.VISIBLE);
+        btnPurchase.setCompoundDrawablesRelativeWithIntrinsicBounds(0, 0,
+                play ? R.drawable.twotone_shopping_cart_24 : R.drawable.twotone_open_in_new_24, 0);
         tvPrice.setVisibility(View.GONE);
         tvGoogle.setVisibility(play ? View.VISIBLE : View.GONE);
         tvNoPlay.setVisibility(

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

@@ -104,17 +104,6 @@
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toBottomOf="@id/tvWhichever" />
 
-        <ImageView
-            android:id="@+id/ivExternal"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_marginStart="12dp"
-            android:contentDescription="@string/title_pro_purchase"
-            app:layout_constraintBottom_toBottomOf="@+id/btnPurchase"
-            app:layout_constraintStart_toEndOf="@+id/btnPurchase"
-            app:layout_constraintTop_toTopOf="@+id/btnPurchase"
-            app:srcCompat="@drawable/twotone_open_in_new_24" />
-
         <TextView
             android:id="@+id/tvPrice"
             android:layout_width="wrap_content"