Bug 294739 [EAS] need service for reporting errors and warnings to the user (in a dialog, or through logging)
Rationale: Having them separated is quite risky, because it introduces artificial division, in which errors are handled. Probably UI plug-ins will use IStatusHandler and Logger, while core plug-ins will just log. How can we notify the user that something went completely wrong in headless plug-in? We need to create a bridge, so actually merge those two frameworks. On the other hand, why should we pass the same problem to IStatusHandler & to Logger? Are there any Statuses which should be shown to the user (and interrupt his work) but should not be logged?
bundles/org.eclipse.e4.ui.workbench.swt/src/org/eclipse/e4/ui/workbench/swt/internal/PartRenderingEngine.java
if (uiRoot instanceof MApplication) {
					spinOnce = false; 
					theApp = (MApplication) uiRoot;
					
					for (MWindow window : theApp.getChildren()) {
						testShell = (Shell) createGui(window);
					}
					
					
				} else if (uiRoot instanceof MUIElement) {
					if (uiRoot instanceof MWindow) {
						testShell = (Shell) createGui((MUIElement) uiRoot);
					} else {
						
						testShell = new Shell(display, SWT.SHELL_TRIM);
						createGui((MUIElement) uiRoot, testShell);
					}
				}
				TestableObject testableObject = (TestableObject) appContext
						.get(TestableObject.class.getName());
				if (testableObject instanceof E4Testable) {
					((E4Testable) testableObject).init(display,
							(IWorkbench) appContext.get(IWorkbench.class
									.getName()));
				}
				
				while (testShell != null && !testShell.isDisposed()
						&& !display.isDisposed()) {
					try {
						if (!display.readAndDispatch()) {