SPDX License Expression empty for matches in License Explorer

[AyanSinhaMahapatra]

Description

Refer to scan below
org.hibernate.core-5.6.7.LIFERAY-PATCHED-1.jar-extract-scan-results.json.txt

This could be populated based on the license_rule_references if present.

System configuration

For bug reports, it really helps us to know:

• What OS are you running on? (Windows/MacOS/Linux) Linux
• What version of scancode-workbench are you running on? v4.0.0
• What version of scancode-toolkit was used to generate the scan file? 32.0.0rc4

[AyanSinhaMahapatra]

This is fixed by #619, closing!