Merge branch 'master' into files_encryption

apps/files/ajax/rawlist.php

apps/files_external/l10n/pl.php

core/css/styles.css

core/js/oc-dialogs.js

core/l10n/pl.php

core/templates/filepicker.html

core/templates/message.html

l10n/pl/core.po

l10n/pl/files_external.po

l10n/templates/core.pot

l10n/templates/files.pot

l10n/templates/files_encryption.pot

l10n/templates/files_external.pot

l10n/templates/files_sharing.pot

l10n/templates/files_trashbin.pot

l10n/templates/files_versions.pot

l10n/templates/lib.pot

l10n/templates/settings.pot

l10n/templates/user_ldap.pot

l10n/templates/user_webdavauth.pot