Add NavContainer splitter distance record

Fix not redrawing when Nav list size changed

Source/GrasscutterTools/App.config

@@ -64,6 +64,9 @@
    <setting name="IsIncludeUID" serializeAs="String">
     <value>False</value>
    </setting>
+   <setting name="NavContainerSplitterDistance" serializeAs="String">
+    <value>0</value>
+   </setting>
   </GrasscutterTools.Properties.Settings>
 	</userSettings>
 </configuration>