Incorrect total size in search result

Issue description

When I search for some modules total size isn't correct. It looks like total size is folder size + size of each file in folder

Technical info

• Webpack Bundle Analyzer version: 3.0.3
• Webpack version: 4.19.1
• Node.js version: 11.9.0
• npm/yarn version: 1.13.0
• OS: macOS Mojave

Debug info

How do you use this module? As CLI utility or as plugin? plugin

If plugin, what options were provided? (e.g. new BundleAnalyzerPlugin({ analyzerMode: 'disabled', generateStatsFile: true })) { openAnalyzer: false }