[tx-robot] updated from transifex

apps/files_odfviewer/l10n/de.php

apps/files_pdfviewer/l10n/de.php

l10n/af/files_odfviewer.po

l10n/af/files_pdfviewer.po

l10n/ar/files_odfviewer.po

l10n/ar/files_pdfviewer.po

l10n/ar_SA/files_odfviewer.po

l10n/ar_SA/files_pdfviewer.po

l10n/bg_BG/files_odfviewer.po

l10n/bg_BG/files_pdfviewer.po

l10n/ca/files_odfviewer.po

l10n/ca/files_pdfviewer.po

l10n/cs_CZ/files_odfviewer.po

l10n/cs_CZ/files_pdfviewer.po

l10n/da/files_odfviewer.po

l10n/da/files_pdfviewer.po

l10n/de/files_odfviewer.po

l10n/de/files_pdfviewer.po

l10n/el/files_odfviewer.po

l10n/el/files_pdfviewer.po