Update the project configs to build GDK/GSK as a static lib and include
them into the GTK+ DLL as a monolithic DLL, which is in line with what is
done in the autotools builds, since the code changes needed for Windows
builds for a monolithic build are now in place.
This follows what happens in the autotools builds.
Also fix some project namespaces and the install project where there is a typo
in a project dep, which may cause a problem during the build.