Hide courseware tab in teachUOS course.

TeachUOS.class.php

@@ -33,6 +33,16 @@ class TeachUOS extends StudipPlugin implements
             );
             $navigation->addSubNavigation("teachUOS", $teachUOS);
         }
+
+        // more setup if this plugin is active in this course
+        $contextId = \Context::getId();
+        if (\Context::getType() === \Context::COURSE && $this->isActivated($contextId)) {
+            if (!$GLOBALS['perm']->have_studip_perm('tutor', $contextId)) {
+                if (Navigation::hasItem('/course/courseware')) {
+                    Navigation::removeItem('/course/courseware');
+                }
+            }
+        }
     }
 
     /**