#1 Plus/minus-signs are missing in JAR-level (Burana #3196)

[Mikko M�kel�]

In the selection tree located in the left-hand side of
the window, the plus and minus signs are missing from
the top level (JAR-file level). These signs are drawn
in the lower levels (package and class), but not in the
top level.

Due to this, the user might not notice that he/she can
reveal more information from the tree by expanding and
collapsing the tree.

How-To-Repeat: Use Visualizator GUI tool.

Suggested-Fix:
This a feature of the JTree class. Could be hard to fix.