Add "Logged time" to the Issue Details tab or add "Work Log" tab

When working in Kanban boards for projects that don't require an estimate process, we still need log our time spent working on the tickets. Currently, we need to open the ticket in the traditional issue detail's view in order to check if we have added any time already. We would like to have better visibility of the logged time without leaving the Greenhopper boards.

I see two possible solutions for this issue.

1. Add the "Logged time" to the Issue Details tab in the right hand side panel.

2. Add a new tab for "Work log" to the Issue Details panel on the right hand side.

I prefer option #2 as this would allow us to add/edit/delete our logged time without leaving the boards.