VS Addin release/debug configuration is inconsistent

After converting the qmake project to vcproj, the project configuration shows that it is in release mode while it actually compiles debug mode after conversion. Once it is changed from release to debug configuration and back, everything works as expected.

Steps to reproduce:

• Create a Qt widgets empty project with Qt creator
• Import with "Open Qt .pro file"
• In solution explorer, right click on "Solution 'xyz', -> Properties, -> Configuration Properties. -> Configuration shows "Release", but configuration after conversion is "Debug".