Bug 282947 [CSS] ETabFolder does not draw right with border-visible: false
CTabFolders have always acted odd with respect to borders off and the first tab when selected. It just starts drawing top left. This behaviour seems to be confusing the ETabFolder draw code. It should draw the same curve regardless of whether borders are on or not.
bundles/org.eclipse.e4.ui.workbench.renderers.swt/src/org/eclipse/e4/workbench/ui/renderers/swt/StackModelFactory.java
/**
	 * @param item
	 */
	protected void showMenu(ToolItem item) {
		MMenu menuModel = (MMenu) item.getData("theMenu"); 
		MItemPart<?> part = (MItemPart<?>) item.getData("thePart"); 
		Menu menu = (Menu) createMenu(part, item, menuModel);
		
		
		
		
		
		
		
		Rectangle ib = item.getBounds();
		Point displayAt = item.getParent().toDisplay(ib.x, ib.y + ib.height);
		menu.setLocation(displayAt);
		menu.setVisible(true);
		Display display = Display.getCurrent();
		while (!menu.isDisposed() && menu.isVisible()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		menu.dispose();
	}
	private Image getViewMenuImage() {
		if (viewMenuImage == null) {
			Display d = Display.getCurrent();
			Image viewMenu = new Image(d, 16, 16);
			Image viewMenuMask = new Image(d, 16, 16);