At the moment, when PACS mode is active, one of its tools is selected at any given time. In certain cases, it would be benefitial to be able to have none active. This is the case when doing segmentations while in PACS mode, since selecting a different PACS tool while a segmentation tool is active will cause both interactors to be active at the same time, without being able to deactivate one of them. (see T28630)
One idea would be to allow users to click a selected PACS tool again to deselect it.