Bug 73027 [Dialogs] Buttons are too high
I20040831 Buttons are no longer oval but have a rounded rectangle shape (see first screenshot). The second screenshot shows how buttons using the small system font should look like.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/PathVariablesGroup.java
*/
    public void dispose() {
        if (imageUnkown != null) {
            imageUnkown.dispose();
            imageUnkown = null;
        }
    }
    /**
     * Opens a dialog for editing an existing variable.
     *
     * @see PathVariableDialog
     */
    private void editSelectedVariable() {
        
        TableItem item = variableTable.getItem(variableTable
                .getSelectionIndex());
        String variableName = (String) item.getData();
        IPath variableValue = (IPath) tempPathVariables.get(variableName);
        
        PathVariableDialog dialog = new PathVariableDialog(shell,
                PathVariableDialog.EXISTING_VARIABLE, variableType,
                pathVariableManager, tempPathVariables.keySet());
        dialog.setVariableName(variableName);
        dialog.setVariableValue(variableValue.toOSString());
        
        if (dialog.open() == Window.CANCEL)
            return;
        
        removedVariableNames.add(variableName);
        tempPathVariables.remove(variableName);