Console text disappears with small font and many characters visible

[aufau]

Due to renderer queue overflow. To fix add renderer command that draws a number of characters instead of one by one (doesn't Font_Draw* already do this?) Furthermore it makes screenshot and video commands not work (due to overflow)

[aufau]

I've commited a fix that makes console command prompt being drawn first and never disappear. Higher part of the console may still be truncated, but fixing this has lower priority.

[aufau]

This is a rather straight forward task with moderate volume of changes required so if someone outside of mvdevs wants to pick it up, I can explain how to fix it and offer a code review.