Bug 185347 [Progress] Concatenate task and subtask with ": " in ProgressMonitorPart
bundles/org.eclipse.jface/src/org/eclipse/jface/wizard/ProgressMonitorPart.java
public void setTaskName(String name) {
        fTaskName = name;
        updateLabel();
    }
    /*
     *  (non-Javadoc)
     * @see org.eclipse.core.runtime.IProgressMonitor#subTask(java.lang.String)
     */
    public void subTask(String name) {
        fSubTaskName = name;
        updateLabel();
    }
    /**
     * Updates the label with the current task and subtask names.
     */
    protected void updateLabel() {
        if (blockedStatus == null) {
            String text = taskLabel();
            fLabel.setText(text);
        } else {
			fLabel.setText(blockedStatus.getMessage());
		}
        
        fLabel.update();
    }
    /**
     * Return the label for showing tasks
     * @return String
     */
    private String taskLabel() {