escape all identifiers with backticks

apps/bookmarks/ajax/editBookmark.php

apps/bookmarks/ajax/recordClick.php

apps/bookmarks/appinfo/migrate.php

apps/bookmarks/bookmarksHelper.php

apps/bookmarks/lib/bookmarks.php

apps/calendar/appinfo/update.php

apps/calendar/lib/calendar.php

apps/calendar/lib/object.php

apps/calendar/lib/share.php

apps/contacts/appinfo/migrate.php

apps/contacts/lib/addressbook.php

apps/contacts/lib/vcard.php

apps/files/appinfo/update.php

apps/files_sharing/lib_share.php

apps/files_sharing/sharedstorage.php

apps/gallery/appinfo/app.php

apps/gallery/appinfo/update.php

apps/gallery/lib/album.php

apps/gallery/lib/managers.php

apps/gallery/lib/photo.php