Openrct2: Adding kb/bytes to 'Downloading map ...'

[Nubbie]

When you join a game in multiplayer, you of course need to download the map which is indicated by STR_5759, but it doesn't tell the player 'how much' it downloads
It could be bytes, kb, mb, TB, or meatballs

Just simply adding kb/byte (Obviously the correct value) would help people understand what the numbers mean

STR_5759 :Downloading map ... ({INT32} / {INT32}) KB

[Krutonium]

Downloading 377/780 Meatballs...