po: Update Traditional Chinese Translation.
- Follow conventions from other zh_TW user interfaces
- Use "確定" for "OK" like KDE
- Remove extra space between keyboard accelerator like in "取消(_C)"
- Follow conventions of modern zh_TW
- Character -> 字元
- 衹有 -> 「只」有
- Fix some "pinentry" translations Sometimes it was translated as an entry of PIN codes among a list and not the "pinentry" tool
- Signed-off-by: Kisaragi Hiu <mail@kisaragi-hiu.com>