fix misc errors

api/pages/lockscreen.php

@@ -1,5 +1,5 @@
 <?php
-
+if(file_exists('config'.DIRECTORY_SEPARATOR.'config.php')){
 $pageLockScreen = '
 <script>
 </script>
@@ -30,3 +30,4 @@ $pageLockScreen = '
   </div>
 </section>
 ';
+}

api/pages/settings-plugins.php

@@ -1,8 +1,9 @@
 <?php
-
+if(file_exists('config'.DIRECTORY_SEPARATOR.'config.php')){
 $pageSettingsPlugins = '
 <script>
 	buildPlugins();
 </script>
 <div id="main-plugin-area"></div>
 ';
+}

api/pages/settings-tab-editor-homepage-order.php

@@ -1,5 +1,5 @@
 <?php
-
+if(file_exists('config'.DIRECTORY_SEPARATOR.'config.php')){
 $pageSettingsTabEditorHomepageOrder = '
 <script>
     $("#homepage-items").sortable({
@@ -48,3 +48,4 @@ $pageSettingsTabEditorHomepageOrder = '
 </div>
 
 ';
+}