Fix bug that caused keys to be highlighted during a rerun

Key events were being ignored after a time trial was cut off. If the
user was pressing a key right when the time was up, the key up event
would be ignored. This meant that the keyboard would remain in a state
wherein it would think a key was still being pressed when it actually
wasn't.

keyboard.js

@@ -145,24 +145,29 @@ function getEventKey(e) {
 
 function keyUpHandler(e) {
 	var input = document.getElementById("input");
-	if (input.disabled) {
-		return;
-	}
-
 	if (e.keyCode === ASCII_SHIFT) {
 		shiftDown = false;
-		requestAnimationFrame(drawKeyboard);
+
+		if (input.disabled) {
+			requestAnimationFrame(drawKeyboard);
+		}
 	} else if (e.keyCode === ASCII_SPACEBAR) {
-		spaceDown = false;
-		requestAnimationFrame(drawKeyboard);
+		spaceDown = false;
+
+		if (input.disabled) {
+			requestAnimationFrame(drawKeyboard);
+		}
 	} else {
 		var key = getEventKey(e);
 
 		for (var i = 0; i < keyboard.length; i++) {
 			for (var j = 0; j < keyboard[i].length; j++) {
 				if (keyboard[i][j] === key) {
 					keyDown[i][j] = false;
-					requestAnimationFrame(drawKeyboard);
+
+					if (input.disabled) {
+						requestAnimationFrame(drawKeyboard);
+					}
 					return;
 				}
 			}