- Circle layout: tooltip position is displayed in the wrong spot.
- D3 layout: tooltip is not displayed in sublayers (Transformers, Substations, Switches).
- d3ForceEnabled needs to be set to true when sublayer changes.
- D3 layout: tooltip position needs to be refined - acceptable for now.
- Transformers sublayer: tooltip position wrong spot.
- D3 layout: drag a node will also move other nodes, which causes their tooltip display in wrong position
- set d3ForceEnabled to false in dragstart event to keep other nodes in place and
- get dragged node's position in dragend event to correctly position the tooltip