Content label macro does not accept "my:favorite"

Summary

Cannot add the keyword "my:favourite" in the Content by label macro.
It was possible to add this keyword in the Content by label macro in the earlier versions eg: 5.6.6 of Confluence. This keyword would return all the pages favourited by the user.

Steps to Reproduce

1. On Confluence 5.8 Favourite a page.
2. Edit any other page and add the Content label macro from other macros
3. In the Label field add my:favourite

Expected Results

Actual Results

Workaround

Use the Favourite Pages macro .