Allow Studio Appdef page to list packages with no target platform specified

Currently, packages with no target platform specified are not listed on the Appdef page in Studio. They should be because they are theoretically compatible with all TPs.
The change must be made in the PackageRepositoryComponent#createStrictTargetPlatformFilterQuery and PackageRepositoryComponent#createRangeTargetPlatformFilterQuery methods and allow packages with null nxpkg:targetPlatformName, nxpkg:targetPlatformRange and nxpkg:targetPlatform to be returned