Add Population Target and more deriveds

Stars Assistant/Views/BuColView.axaml

@@ -10,7 +10,6 @@
 
   <DataGrid x:Name="PlanetsGrid"
     ItemsSource="{Binding Planets}"
-    IsReadOnly="True" 
     GridLinesVisibility="All"
     FrozenColumnCount="1"
     BorderThickness="1" BorderBrush="Gray">
@@ -22,7 +21,7 @@
         <!-- Pop To Ship -->
         <DataGridTextColumn Header="Growth" Binding="{Binding PopulationGrowth}" />
         <!-- Pop en route -->
-        <!-- Pop Target % -->
+        <DataGridTextColumn Header="Pop Tgt %" Binding="{Binding PopulationTargetPercent}" />
         <DataGridTextColumn Header="Pop%" Binding="{Binding CapacityPercent}" />
         <!-- Terra Delta assumed -->
         <DataGridTextColumn Header="Value" Binding="{Binding Value}" />
@@ -48,7 +47,7 @@
         <DataGridTextColumn Header="Fact" Binding="{Binding Factories}" />
         <DataGridTextColumn Header="Res" Binding="{Binding Resources}" />
         <!-- Overcrowding Rate -->
-        <!-- Target population absolute -->
+        <DataGridTextColumn Header="Pop Tgt" Binding="{Binding PopulationTarget}" />
     </DataGrid.Columns>
   </DataGrid>