At the moment, this implementation is parallel to the existing TaskPane implementation, but on the medium term, it is
intended to replace it. No change in functionality is planned for the moment, just the panel selection is done via
a tab bar, instead of the the "jumping drawers".
Pending tasks (as known so far):
- Accessibility. No implementation at all, yet.
- showing/hiding tool panels from the "View" drop down menu
- connection to the resource framework. At the moment, de/activating panels completely bypasses the resource
  framework.
- alternative implementation of the PanelDeckLayouter which mimics the old design. To be activated by default, for
  the moment.
- removal of the (old, by then) TaskPane implementation. Care needs to be taken that the framework API stays
  unchanged, i.e., the current ToolPanel resource must be renamed back to RightPane when RightPane is not
  occupied anymore by the old implementation. Same for other resource names.