Fixed issue navigating away and back to tab view

Aurora/Design/Views/Party/PartyView.xaml

@@ -18,6 +18,7 @@
                  HorizontalOptions="FillAndExpand"
                  VerticalOptions="FillAndExpand"
                  TabSizeOption="100"
+                 SelectedTabIndex="{Binding SelectedTabIndex}"
                  HeaderBackgroundColor="#232323"
                  x:Name="TabView">
                 <tabView:TabViewControl.ItemSource>

Aurora/Design/Views/Party/PartyViewModel.cs

@@ -34,6 +34,8 @@ namespace Aurora.Design.Views.Party
         private BaseMedia _selectedMedia;
         private ClientService _client;
 
+        private int _selectedTabIndex;
+
         public PartyViewModel()
         {
             _members = new ObservableCollection<PartyMember>();
@@ -59,6 +61,12 @@ namespace Aurora.Design.Views.Party
 
         #region Properties
 
+        public int SelectedTabIndex
+        {
+            get { return _selectedTabIndex; }
+            set { SetProperty(ref _selectedTabIndex, value); }
+        }
+
         /// <summary>
         /// Publc property for the members list
         /// </summary>
@@ -119,6 +127,7 @@ namespace Aurora.Design.Views.Party
         /// <returns></returns>
         public override async Task OnActive()
         {
+            OnPropertyChanged("SelectedTabIndex");
             if (this._state == PartyState.Hosting ||
                 this._state == PartyState.InParty)
             {