Bug 321995 Application-Context should hold Display-Realm
The application context should hold the databinding realm for the current SWT-Display it can then be used to by code to synchronize with the UI-Thread in a widget-toolkit agnostic way.
bundles/org.eclipse.e4.ui.workbench.swt/src/org/eclipse/e4/ui/internal/workbench/swt/E4Application.java
}
	public Object start(IApplicationContext applicationContext)
			throws Exception {
		Display display = getApplicationDisplay();
		E4Workbench workbench = createE4Workbench(applicationContext);
		Location instanceLocation = (Location) workbench.getContext().get(
				E4Workbench.INSTANCE_LOCATION);
		Shell shell = display.getActiveShell();
		if (shell == null)
			shell = new Shell();
		try {
			if (!checkInstanceLocation(instanceLocation, shell))
				return EXIT_OK;
			IEclipseContext workbenchContext = workbench.getContext();
			workbenchContext.set(Display.class, display);
			
			workbench.createAndRunUI(workbench.getApplication());
			
			if (lcManager != null) {
				ContextInjectionFactory.invoke(lcManager, PreSave.class,
						workbenchContext, null);
			}
			saveModel();
			workbench.close();
			return EXIT_OK;
		} finally {
			if (display != null)
				display.dispose();
			if (instanceLocation != null)
				instanceLocation.release();