Remove whitespace and tabs.
unify text in tooltip with web.
Do not filter tagset.
Change method signature.
Load tags and tag sets.
Replace JList by JTree in selection.
Prepare code to expand node
Fix filtering with new structure.
Remove printout.
Add tooltip
Clean up code.
Notifies of selection changes
Fix selection and save.
Implement isChild method.
Fix selection remove/add.
Fix selection change method.
Include tag Set in tooltip.
Re-order import.
Expand nodes
Format tooltip for all tags.