Bug 305036 [Path Variables] Minor API changes in Dynamic Path Variables area
I'm attaching a patch illustrating what should be done in this area.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/PathVariablesGroup.java
variableTable.getTable().setHeaderVisible(true);
        data = new GridData(GridData.FILL_BOTH);
        data.heightHint = variableTable.getTable().getItemHeight() * 7;
        variableTable.getTable().setLayoutData(data);
        variableTable.getTable().setFont(font);
        variableTable.getTable().addMouseListener(new MouseListener() {
			public void mouseDoubleClick(MouseEvent e) {
		        int itemsSelectedCount = variableTable.getTable().getSelectionCount();
		        if (itemsSelectedCount == 1 && canChangeSelection())
		        	editSelectedVariable();
			}
			public void mouseDown(MouseEvent e) { }
			public void mouseUp(MouseEvent e) { }
        });
        variableTable.getTable().addSelectionListener(new SelectionListener() {
			public void widgetSelected(SelectionEvent e) {
		        updateEnabledState();
			}
			public void widgetDefaultSelected(SelectionEvent e) {
		        updateEnabledState();
			}
        });
        
        variableTable.getTable().setToolTipText(null);
        variableTable.setContentProvider(new ContentProvider());
        variableTable.setInput(this);
        createButtonGroup(pageComponent);
        return pageComponent;
    }
    class NameLabelProvider extends CellLabelProvider