Convert to Qt/MsBuild action fails with solution-relative property sheets

[mkentie]

Using Qt Vs Tools 3.4.1, if I have a project that references a props file such as

The conversion will fail because $(SolutionDir) is not resolved, and it tries to load the properties file relative to the project directory:

Editing the vcxproj file to use relative paths for the property sheet is a workaround.