remove useless style def, mage PAGE_SIZE cost

Author: Trolldemorted

Signal-Windows/Controls/Conversation.xaml

@@ -42,9 +42,6 @@
                     <Setter Property="HorizontalContentAlignment" Value="Stretch" />
                 </Style>
             </ListView.ItemContainerStyle>
-            <ListView.Style>
-                <Style TargetType="ListView" />
-            </ListView.Style>
         </ListView>
         <Grid Grid.Row="2" BorderBrush="{ThemeResource TextBoxBorderThemeBrush}" BorderThickness="0,1,0,0">
             <Grid.ColumnDefinitions>

Signal-Windows/Controls/VirtualizedMessagesCollection.cs

@@ -30,7 +30,7 @@ public class SignalUnreadMarker
 
     public class VirtualizedCollection : IList, INotifyCollectionChanged
     {
-        private readonly static int PAGE_SIZE = 50;
+        private const int PAGE_SIZE = 50;
         public event NotifyCollectionChangedEventHandler CollectionChanged;
         private Dictionary<int, IList<SignalMessageContainer>> Cache = new Dictionary<int, IList<SignalMessageContainer>>();
         private SignalConversation Conversation;