Unable to search by title for a team's shared entities TC679

## Expected Behavior

Given a team that has had entities shared with it:
- open details view
- enter something valid in the shared entities search by title field
- only entities with a title containing the specified string are visible

## Current Behavior

Nothing is visible when anything is entered, regardless whether it matches or not

## Your Environment

* Graylog Version: 5.1.0