Fixes a typo reported by Hamid Yaseen. Closes #283.

modules/UI/audio_levels/AudioLevels.js

                 resized = true;
             }
 
-            if (canvas.heigh !== height + interfaceConfig.CANVAS_EXTRA) {
+            if (canvas.height !== height + interfaceConfig.CANVAS_EXTRA) {
                 canvas.height = height + interfaceConfig.CANVAS_EXTRA;
                 resized = true;
             }