Bug 92905 Initial use of Open Type gives no feedback for several seconds
build I20050426-1700 - switched to new build - used Ctrl+Shift+T - it appeared unresponsive for several seconds (though CPU usage went up), then the "Checking model consistency..." dialog came up and did work for a while - should bring up the dialog sooner, or show the busy cursor if this is not possible
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/dialogs/TypeSelectionDialog2.java
public int open() {
		try {
			ensureConsistency();
		} catch (InvocationTargetException e) {
			ExceptionHandler.handle(e, JavaUIMessages.TypeSelectionDialog_error3Title, JavaUIMessages.TypeSelectionDialog_error3Message); 
			return CANCEL;
		} catch (InterruptedException e) {
			
			return CANCEL;
		}
		return super.open();
	}
	
	public boolean close() {
		TypeInfoHistory.getInstance().save();
		return super.close();
	}
	
	protected void computeResult() {
		TypeInfo[] selected= fContent.getSelection();
		if (selected == null || selected.length == 0) {
			setResult(null);
			return;
		}
		
		TypeInfoHistory history= TypeInfoHistory.getInstance();
		List result= new ArrayList(selected.length);
		if (result != null) {
			for (int i= 0; i < selected.length; i++) {
				try {