VS: Fix .sln support for VS Version Selector with VS 2019
VS 2019 changed the naming pattern used by 2015 and 2017.
Fixes: #20783 (closed)
Backport: release
Edited by Brad King
VS 2019 changed the naming pattern used by 2015 and 2017.
Fixes: #20783 (closed)
Backport: release