Specify output in which all tasks are displayed
Specify output in which all tasks are displayed

This will fix issue archivematica/Issues#85
specifying a dedicated output window as target to display tasks
in one single tab rather than opening one after every click on the
tasks gear.

artefactual/archivematica,artefactual/archivematica,artefactual/archivematica,artefactual/archivematica