A_Print option not to log to console

[Matt]

I'm in a situation where I've got an A_Print that lasts for a few seconds, but I want the player to be able to get rid of it earlier if they want.

So far I've been doing this with A_Print("") which works but leaves this off-putting pair of bars in the console.

I was initially going to suggest something like "A_ClearPrint" but it occurs to me that an A_Print that doesn't clutter up the console would be a lot more useful for a lot more things, including my A_Print("") hack which would make any "A_ClearPrint" totally redundant anyway.

It would certainly make the engine more accessible to modders who want to work with special effects related to HUD text (briefings, dialogue, etc.) without messing with ACS or doing anything drastic with the HUD.