Don't copy all items if none are selected when clicking the + button.

Use toolset v142 for Visual Studio 2019.

Author: fdwr

MainWindow.ixx

@@ -1087,7 +1087,7 @@ void MainWindow::EnsureAtLeastOneDrawableObject()
 void MainWindow::CreateDrawableObjectsListViewSelected()
 {
     auto attributeValuesListView = GetWindowFromId(hwnd_, IdcAttributeValuesList);
-    std::vector<uint32_t> drawableObjectIndices = GetSelectedDrawableObjectIndices(/*returnAllIfNoMatch*/true);
+    std::vector<uint32_t> drawableObjectIndices = GetSelectedDrawableObjectIndices(/*returnAllIfNoMatch*/false);
     std::vector<uint32_t> attributeValueIndices = GetListViewMatchingIndices(attributeValuesListView, LVNI_SELECTED, /*returnAllIfNoMatch*/false);
 
     // Create a default object or duplicate a selected one.

TextLayoutSampler.vcxproj

@@ -27,7 +27,7 @@
   <PropertyGroup Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v142</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />