FTR: HUD: XHair: Name of Targeted Player Should be Displayed

[proof88]

We already do an xhair 2D -> 3D unprojection at some point, so the unprojected coords should be collided with any players.
I'm marking this as M size because first we need to make the unprojected xhair coords available across modules for the current frame, so only 1 unprojection is done per frame. After this we can use this.
Later in the future this should be optimized somehow, i.e. beginning of frame a list of players within the view frustum should be made so we need to do collision check with only these.

[proof88]

Added for v0.2.5.
One bug opened for the future: #323