Bug 208098 [Markers] All content provider needs a type field
As All shows everything the type column would be very useful for filtering.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/MarkerEntry.java
}
			IPath path = marker.getResource().getFullPath();
			int n = path.segmentCount() - 1; 
			
			if (n <= 0) {
				return super.getPath();
			}
			int len = 0;
			for (int i = 0; i < n; ++i) {
				len += path.segment(i).length();
			}
			
			if (n > 1) {
				len += n - 1;
			}
			StringBuffer sb = new StringBuffer(len);
			for (int i = 0; i < n; ++i) {
				if (i != 0) {
					sb.append('/');
				}
				sb.append(path.segment(i));
			}
			folder = sb.toString();
		}
		return folder;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.provisional.views.markers.MarkerItem#isConcrete()