Audit log logs sometimes relative references

## Describe the bug
Audit log logs sometimes relative references

## Steps to reproduce
1. use audit log
2. use the Web UI / native apps / clients

## Expected behavior
I have always a absolute reference to a file / folder / element

## Actual behavior
Some audit logs have only relative references. There should always be a absolute reference, too. Only that way we can ensure to find audit log lines that are referencing a file

## Setup
oCIS 4.0.2