fixed Submitting search form (mini) with enter key fires event handle

Author: gelanivishal

app/code/Magento/Search/view/frontend/web/form-mini.js

@@ -207,6 +207,7 @@ define([
                     break;
                 case $.ui.keyCode.ENTER:
                     this.searchForm.trigger('submit');
+                    e.preventDefault();
                     break;
                 case $.ui.keyCode.DOWN:
                     if (this.responseList.indexList) {