main_fragment.xml: Make Scanner accessible also when unpaired.

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

@@ -23,26 +23,26 @@
               app:layout_constraintRight_toRightOf="parent"
               app:layout_constraintTop_toBottomOf="@+id/image_logo"/>
 
+    <Button android:id="@+id/button_pair"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/main_button_pair"
+            android:layout_marginTop="@dimen/main_label_margin"
+            style="@style/MainButton"
+            app:layout_constraintTop_toBottomOf="@id/label_status"
+            app:layout_constraintLeft_toLeftOf="parent"
+            app:layout_constraintRight_toRightOf="parent"/>
+
     <androidx.constraintlayout.widget.ConstraintLayout android:layout_width="match_parent"
                                                        android:layout_height="0dp"
-                                                       app:layout_constraintTop_toBottomOf="@+id/label_status"
+                                                       app:layout_constraintTop_toBottomOf="@id/button_pair"
                                                        app:layout_constraintBottom_toBottomOf="parent"
                                                        android:id="@+id/container_disconnected">
-        <Button android:id="@+id/button_pair"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="@string/main_button_pair"
-                android:layout_marginTop="@dimen/main_label_margin"
-                style="@style/MainButton"
-                app:layout_constraintBottom_toBottomOf="parent"
-                app:layout_constraintLeft_toLeftOf="parent"
-                app:layout_constraintRight_toRightOf="parent"/>
-
     </androidx.constraintlayout.widget.ConstraintLayout>
 
     <androidx.constraintlayout.widget.ConstraintLayout android:layout_width="match_parent"
                                                        android:layout_height="0dp"
-                                                       app:layout_constraintTop_toBottomOf="@+id/label_status"
+                                                       app:layout_constraintTop_toBottomOf="@id/button_pair"
                                                        android:id="@+id/container_connected">
         <Button android:layout_width="wrap_content"
                 android:layout_height="wrap_content"