added support for op+3 icons

src/pixmaps/pixmaps.vcxproj

@@ -98,6 +98,7 @@
     <None Include="hop.png" />
     <None Include="message.png" />
     <None Include="op.png" />
+    <None Include="orange.png" />
     <None Include="purple.png" />
     <None Include="red.png" />
     <None Include="server.png" />
@@ -107,4 +108,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>