Fixed i18n namespace for "Sync Files"

code/controllers/AssetAdmin.php

@@ -206,7 +206,7 @@ JS
 					'<a class="ss-ui-button ss-ui-action ui-button-text-icon-primary ss-ui-button-ajax" data-icon="arrow-circle-double" title="%s" href="%s">%s</a>',
 					_t('AssetAdmin.FILESYSTEMSYNCTITLE', 'Update the CMS database entries of files on the filesystem. Useful when new files have been uploaded outside of the CMS, e.g. through FTP.'),
 					$this->Link('doSync'),
-					_t('FILESYSTEMSYNC','Sync files')
+					_t('AssetAdmin.FILESYSTEMSYNC','Sync files')
 				)
 			);
 		} else {

lang/en.yml

@@ -13,6 +13,7 @@ en:
     CurrentFolderOnly: 'Limit to current folder?'
     DetailsView: Details
     FILES: Files
+    FILESYSTEMSYNC: 'Sync files'
     FILESYSTEMSYNCTITLE: 'Update the CMS database entries of files on the filesystem. Useful when new files have been uploaded outside of the CMS, e.g. through FTP.'
     FROMTHEINTERNET: 'From the internet'
     FROMYOURCOMPUTER: 'From your computer'
@@ -394,8 +395,6 @@ en:
     PLURALNAME: 'Virtual Pags'
     PageTypNotAllowedOnRoot: 'Original page type "{type}" is not allowed on the root level for this virtual page'
     SINGULARNAME: 'Virtual Page'
-  cms:
-    FILESYSTEMSYNC: 'Sync files'
   CMSFileAddController:
     MENUTITLE: Files
   CMSPageEditController: