Bug 85452 [IDE] (regression) Backdrop missing when all perspectives closed
I20050215-2300 - close all perspectives - the main page is blank - it should have a backdrop with text and button explaining how to open a perspective
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/IDEWorkbenchWindowAdvisor.java
if (id == null || i >= wCount) {
                    openWelcomeEditor(window, new WelcomeEditorInput(newInfo),
                            id);
                }
            }
        }
    }
    /**
     * Open a welcome editor for the given input
     */
    private void openWelcomeEditor(IWorkbenchWindow window,
            WelcomeEditorInput input, String perspectiveId) {
        if (getWorkbench().getWorkbenchWindowCount() == 0) {
            
            
            return;
        }
        IWorkbenchWindow win = window;
        if (perspectiveId != null) {
            try {
                win = getWorkbench().openWorkbenchWindow(perspectiveId,
                        wbAdvisor.getDefaultPageInput());
                if (win == null) {
                    win = window;
                }
            } catch (WorkbenchException e) {
                IDEWorkbenchPlugin
                        .log(
                                "Error opening window with welcome perspective.", e.getStatus()); 
                return;