Scroll the input window

I was wondering if I should instead make input wrap, but then wordWrap
would need to both support showing formatting and persisting styles
across to strings, and it would need to move the window pad up and down
a bunch, etc.

ui.c

@@ -220,10 +220,11 @@ void uiDraw(void) {
 		1, 0,
 		BOTTOM - 1, RIGHT
 	);
-	// TODO: Input scrolling.
+	int y, x;
+	getyx(input, y, x);
 	pnoutrefresh(
 		input,
-		0, 0,
+		0, (x > RIGHT ? x - RIGHT : 0),
 		BOTTOM, 0,
 		BOTTOM, RIGHT
 	);