This patch will allow the installer to perform per-user installations that doesn't require elevated rights. If the Visual Studio prerequisites are missing, the installer will ask the user if he wants to install them. If the user chooses not to, the installer will deploy the necessary files in the installation folder. Installations for all users (per machine) are still available. Upon upgrading in per-user installs from previous versions, the user can still access the settings that were stored in the registry, but not the settings stored in system-settings.xml. Test-Information: Build and tested with Wix3.11, Qt 5.8 and Visual Studio 2015 on Windows 10 and Windows 7. Tested fresh install and upgrade, for per-machine and per-user installations. Tested the vcredist install and the dll deployment when the installation is not present. Verified that the installer uses the registry settings in per-user installations. Change-Id: I1879e2fb7ee347dab58852eb73d4ddddec15b35d