Translation for LibreOffice

[Tseng, Cheng-Chia]

As to Chinese (Traditional), we have imcomplete desktop entries
translation. Draw is English, and Math lacks a Chinese period ("。").

See https://bugs.launchpad.net/ubuntu-translations/+bug/774024 and
https://bugs.launchpad.net/ubuntu-translations/+bug/774020

It seems that the translations of desktop entries are pushed in a hurry.

-- 
Sincerely,
by Cheng-Chia Tseng