time managnet footer in issue list only visible if at least one tracker in active

[cforce]

This sounds as useful, but in case of parent projects without onw tracker it is a bug
When i only manage traclers and issues in children projects and use parent project to search and filter issues of its childs i won't get time data sum for the showed issues.

[cforce]

Would be great if u can give a hint how to fix that myself, tx