FIX: Missing Simplified Chinese translation

[GoldJohnKing]

• Fix: Missing Simplified Chinese translation for Add: Tow stick to ACE standard #1222, Add: Player can use horn, beacons and siren to stop civilian mouvements #1235, Add: Remove wheels of civilian vehicles decrease reputation #1240, Add: ACE Headless support #1251, Add: Show the number of days since mission start #1254, Add: Explosive open door #1257, FIX: Order from horn doesn't work after firing from the vehicle #1260 (@GoldJohnKing).

When merged this pull request will:

• Fix: Missing Simplified Chinese translation for Add: Tow stick to ACE standard #1222, Add: Player can use horn, beacons and siren to stop civilian mouvements #1235, Add: Remove wheels of civilian vehicles decrease reputation #1240, Add: ACE Headless support #1251, Add: Show the number of days since mission start #1254, Add: Explosive open door #1257, FIX: Order from horn doesn't work after firing from the vehicle #1260 (@GoldJohnKing).
• Discussion: Multilingual support #400

Final test:

• local
• server

[Vdauphin]

Thanks!