fix(jqLite): Firefox validation trigger

Do not trigger Firefox validation on form initialization.
- Do not set a value to an <input> field if the field already has the same value

Closes #12102

Author: lgalfaso

src/jqLite.js

@@ -671,7 +671,10 @@ forEach({
       }
       return element.value;
     }
-    element.value = value;
+    // Workaround for Firefox validation #12102.
+    if (element.value != value) {
+      element.value = value;
+    }
   },
 
   html: function(element, value) {