CMake improvements
A few improvements mainly in the context of multi-configuration generators:
- Creating Windows installation failed if dependend libraries are installed for multiple configurations
- Windows installation did not respect whether TIFF was deselected in the options
- Disabling Qt debug output was not working for multi-configurations
- added a few messages to show generator info
- rectified messages to work with multi-configurations
- allow "Edit and continue" in Windows debug configuration
- reduce library import clutter of dependent targets (make libraries "PRIVATE" when only internally used by the imported target)
Edited by m.puchner