Bug 25737 Control+PERIOD does not navigate to next warning
If my CU has only Warnings, Control+PERIOD does not work. Why is this? On the ? Toolbar it is labeled "Next Problem". I am trying to fix warnings indicated by JDT's compiler such as non-externalized strings, and by CheckStyle. This Action should still be enabled when there are warning in the CU.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaMarkerAnnotation.java
* based upon the properties of the underlying marker.
	 */
	protected void initialize() {
		
		IMarker marker= getMarker();
		
		if (MarkerUtilities.isMarkerType(marker, IBreakpoint.BREAKPOINT_MARKER)) {
			
			if (fPresentation == null) 
				fPresentation= DebugUITools.newDebugModelPresentation();
				
			setLayer(4);
			setImage(fPresentation.getImage(marker));					
			
			fType= AnnotationType.UNKNOWN;
			
		} else {
			
			fType= AnnotationType.UNKNOWN;
			try {
				
				if (marker.isSubtypeOf(IJavaModelMarker.JAVA_MODEL_PROBLEM_MARKER)) {
					int severity= marker.getAttribute(IMarker.SEVERITY, -1);
					switch (severity) {
						case IMarker.SEVERITY_ERROR:
							fType= AnnotationType.ERROR;
							break;
						case IMarker.SEVERITY_WARNING:
							fType= AnnotationType.WARNING;
							break;