Set loadStatus to HEADER for songs loaded from cache. Fixes #1088

[soonick]

What does this PR do?

Fixes #1088

Closes Issue(s)

#1088

Motivation

Issue #1088

[github-actions[bot]]

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• Performous-1.3.1+git-36b6185-PR1090-alpha-fedora_42.rpm.zip
• Performous-1.3.1+git-36b6185-PR1090-alpha-fedora_39.rpm.zip
• Performous-1.3.1+git-36b6185-PR1090-alpha-debian_13.deb.zip
• Performous-1.3.1+git-36b6185-PR1090-alpha-fedora_41.rpm.zip
• Performous-1.3.1+git-36b6185-PR1090-alpha-fedora_40.rpm.zip
• Performous-1.3.1+git-36b6185-PR1090-alpha-fedora_36.rpm.zip
• Performous-1.3.1+git-36b6185-PR1090-alpha-ubuntu_24.04.deb.zip
• Performous-1.3.1+git-36b6185-PR1090-alpha-fedora_37.rpm.zip
• Performous-1.3.1+git-36b6185-PR1090-alpha-fedora_38.rpm.zip
• Performous-1.3.1+git-36b6185-PR1090-alpha-ubuntu_22.04.deb.zip
• Performous-1.3.1+git-36b6185-PR1090-alpha-ubuntu_20.04.deb.zip
• Performous-1.3.1+git-36b6185-PR1090-alpha-debian_12.deb.zip
• Performous-1.3.1+git-36b6185-PR1090-alpha-arm64.dmg.zip
• Performous-1.3.1+git-36b6185-PR1090-alpha.AppImage.zip
• Performous-1.3.1+git-36b6185-PR1090-alpha-mingw-w64.exe.zip
• Performous-1.3.1+git-36b6185-PR1090-alpha-x86_64.dmg.zip
• Performous-1.3.1+git-36b6185-PR1090-alpha-msvc.exe.zip

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