Added FindCommand as a binding.

PcgsInvUi/Views/MainWindow.axaml

@@ -64,7 +64,7 @@
                     <Button Grid.Column="0" Margin="5" Width="100" HorizontalContentAlignment="Center" Content="Delete"  
                             Command="{Binding DeleteCommand}"/>
                     <Button Grid.Column="1" Margin="5" Width="100" HorizontalContentAlignment="Center" Content="Find..." 
-                            />
+                            Command="{Binding FindCommand}"/>
                 </Grid>
                 <Grid HorizontalAlignment="Right" VerticalAlignment="Bottom" Margin="5" ColumnDefinitions="Auto, Auto" DockPanel.Dock="Right">
                     <Label Grid.Column="0" Margin="5" VerticalAlignment="Center" Content="{Binding TotalValue, StringFormat='Total Value: ${0:0.00}'}" />