Niko on 19 May, 2016 08:16 PM
Yes, what you should do to unclutter your interface is this: Archive the task by right-clicking on it and choosing "Archive task".
Archived tasks will no longer show up in the menu bar panel. In Timelime's preferences you can enable "Include archived task times" if you want the times to show up in the totals in this panel.
In Timelime's main window there is a button under the task list that lets you show or hide archived tasks in the main window.