Fixed a InvalidOperationException and crash that could occur when vie…

…wing the Cargo Monitor while it contains cargo.

A TwoWay or OneWayToSource binding cannot work on the read-only property 'need' of type 'EddiDataDefinitions.Cargo'

CargoMonitor/ConfigurationWindow.xaml

@@ -93,7 +93,7 @@
                         </Style>
                     </DataGridTextColumn.ElementStyle>
                 </utility:DataGridNumericColumn>
-                <utility:DataGridNumericColumn Header="{x:Static resx:CargoMonitor.header_need}" Width="80" Binding="{Binding Path=need, NotifyOnTargetUpdated=True, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay, TargetNullValue={x:Static System:String.Empty}}">
+                <utility:DataGridNumericColumn Header="{x:Static resx:CargoMonitor.header_need}" Width="80" Binding="{Binding Path=need, NotifyOnTargetUpdated=True, UpdateSourceTrigger=PropertyChanged, Mode=OneWay, TargetNullValue={x:Static System:String.Empty}}">
                     <DataGridTextColumn.HeaderStyle>
                         <Style TargetType="DataGridColumnHeader">
                             <Setter Property="HorizontalContentAlignment" Value="Center" />

ChangeLog.md

@@ -3,6 +3,8 @@
 Full details of the variables available for each noted event, and VoiceAttack integrations, are available in the individual [event pages](https://github.com/EDCD/EDDI/wiki/Events).
 
 ## 4.0.4-b4
+  * Cargo Monitor
+    * Fixed a crash that could occur when viewing the Cargo Monitor while it contains cargo.
 
 ## 4.0.4-b3
   * Core