title: MvvmCross MvxSpinner does not update after re-entering
body: <p><strong>Resolved</strong></p>
  
  <p>Please, I need some help!</p>
  
  <p>Android Situation:</p>
  
  <p>MSVisualStudio 2015 + Xamarin + Mvvmcross 4.4</p>
  
  <p>One Activity and Several Fragments. Using default presenter.</p>
  
  <p>1- View (Fragment) with MvxRecyclerView, a row is selected for editing.</p>
  
  <p>2- Show new view (Fragment) with a MvxSpinner, and change its value (A) to another one (B). Remember: A &amp; B are objects.</p>
  
  <pre><code>&lt;Mvx.MvxSpinner
      android:id="@+id/spinner_academic_start_week"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      local:MvxDropDownItemTemplate="@layout/spinner_basic"
      local:MvxItemTemplate="@layout/item_spinner_basic"
      local:MvxBind="ItemsSource AcademicYearWeeksCollection; SelectedItem AcademicStartWeek; HandleItemSelected SelectAcademicStartWeekCommand" /&gt;
  </code></pre>
  
  <p>and there is a ViewModel with</p>
  
  <pre><code>public IList&lt;AcademicYearWeeks&gt; AcademicYearWeeksCollection { get { return _academicYearWeeksCollection; } }
  </code></pre>
  
  <p>where <em>AcademicYearWeeks</em> is a class with properties and so on.</p>
  
  <p>3- Cancel edition and return to View with MvxRecyclerView.</p>
  
  <p>4- Repeat click for edit same row.</p>
  
  <p>5- Oooppps! Spinner shows B not A. Why????</p>
  
  <p>Other considerations:</p>
  
  <p>Fragment with spinner always is called using</p>
  
  <pre><code>ShowViewModel&lt;CourseViewModel&gt;(
      new
       {
          courseId = item.CourseId
       });
  </code></pre>
  
  <p>and its ViewModel associated</p>
  
  <pre><code>public void Init(int courseId)
  {
      _courseId = courseId;
  }
  
  public override void Start()
  {
      base.Start();
  
      LoadAcademicYearWeeksCollection();
  
      if (_courseId == 0)
          NewCourse();
      else
          LoadCourse();
  }
  </code></pre>
  
  <p>and is closed using </p>
  
  <pre><code>Close(this)
  </code></pre>
  
  <p>I'll be very greatful!</p>
  
  <p>Thanks.</p>