Issue Summary

Marketplace app (plugin) names are lost when installed with the UPM.

Steps to Reproduce

1. Navigate to the UPM (⚙️ (gear icon) > Manage apps).
2. Install or update an app.
3. Check <jira-home>/plugins/installed-plugins.

Expected Results

The plugin's original name is included in the JAR file name. For example: jira-charting-plugin-5.0.0.jar

Actual Results

The file downloaded by the UPM is renamed randomly, making it hard to know which plugin/app versions are installed. For example: plugin.10229976087263648033.download.jar

Workaround

So far, the only workaround is downloading the .jar directly from the Marketplace, bypassing the UPM.