Fix waves SVG error and use parentNode which has more predictable behavior for SVG elements in IE 11

Author: Dogfalo

js/waves.js

@@ -258,17 +258,13 @@
         var element = null;
         var target = e.target || e.srcElement;
 
-        while (target.parentElement !== null) {
+        while (target.parentNode !== null) {
             if (!(target instanceof SVGElement) && target.className.indexOf('waves-effect') !== -1) {
                 element = target;
                 break;
-            } else if (target.className.indexOf('waves-effect') !== -1) {
-                element = target;
-                break;
             }
-            target = target.parentElement;
+            target = target.parentNode;
         }
-
         return element;
     }
 
@@ -320,7 +316,7 @@
         // to specify them with an options param? Eg. light/classic/button
         if (element.tagName.toLowerCase() === 'input') {
             Effect.wrapInput([element]);
-            element = element.parentElement;
+            element = element.parentNode;
         }
 
         if ('ontouchstart' in window) {