Add server-side logging when not existing components are required and fix code style issues

refs #4456

application/controllers/StaticController.php

@@ -30,6 +30,7 @@
 use \Zend_Controller_Action_Exception as ActionException;
 use \Icinga\Web\Controller\ActionController;
 use \Icinga\Application\Icinga;
+use \Icinga\Application\Logger;
 
 class StaticController extends ActionController
 {
@@ -124,6 +125,9 @@ class StaticController extends ActionController
         }
 
         if (!file_exists($filePath)) {
+            Logger::error(
+                'Non-existing frontend component "' . $module . '/' . $file
+                . '" was requested, which would resolve to the the path: ' . $filePath);
             echo '/** Module has no js files **/';
             return;
         }

test/js/test/icinga/componentTest.js

@@ -74,7 +74,6 @@ describe('Component loader',function(){
         addComponent('app/component1');
 
         component.load(function() {
-            // loading complete
             var cmpNode = $('#icinga-component-0');
             cmpNode.length.should.equal(1);
             cmpNode[0].test.should.equal('changed-by-component-1');
@@ -87,7 +86,6 @@ describe('Component loader',function(){
         addComponent('app/component2','some-id');
 
         component.load(function() {
-            // loading complete
             var cmpNode = $('#some-id');
             cmpNode.length.should.equal(1);
             cmpNode[0].test.should.equal('changed-by-component-2');
@@ -103,7 +101,6 @@ describe('Component loader',function(){
         addComponent('module/component3');
 
         component.load(function() {
-            // loading complete
             var components = component.getComponents();
             components.length.should.equal(4);
             $('body').empty();