[UWMOODLE-561] fixing bug as apparently $context being passed into the...

[UWMOODLE-561] fixing bug as apparently $context being passed into the extends_settings_navigation function can be null/false

lang/en/local_archive.php

@@ -16,10 +16,11 @@ $string['rebuildindex'] = 'Rescan archives';
 $string['scanbutton'] = 'Scan';
 $string['selectarchives'] = 'Select which archives to scan';
 
-$string['default_moodle_import_link_text'] = 'Import (local)';
+$string['default_moodle_import_link_text'] = 'Import (current site)';
 
 // Settings string
 $string['settings_page_name'] = 'Configure WISC archive plugin';
 $string['override_link_setting'] = 'Override default import url';
 $string['override_link_setting_desc'] = '<p>This setting will change the default import link in course administration to the WISC archive ' .
-                                        'import functionality instead the default.</p><p>For site administrators, both links will be displayed.</p>';
\ No newline at end of file
+                                        'import functionality instead the default.</p><p>For site administrators, both links will be displayed.</p>';
+

lib.php

@@ -43,6 +43,10 @@ function local_archive_extends_settings_navigation($settingsnav, $context){
         return;
     }
 
+    if($context->contextlevel == CONTEXT_SYSTEM || empty($context)){
+        return;
+    }
+
     $coursecontext = $context->get_course_context();
 
     // If there is no course context return we aren't in a course