Add ablility to ovveride same filter woth url applier, fix unstable

mftf test

Author: Nazar65

app/code/Magento/Catalog/Test/Mftf/Test/AdminProductGridUrlFilterApplierTest.xml

@@ -31,10 +31,11 @@
             <actionGroup ref="AdminLogoutActionGroup" stepKey="logoutOfAdmin"/>
         </after>
 
-        <amOnPage url="{{AdminProductIndexPage.url}}?filters[name]=$createSimpleProduct.name$" stepKey="navigateToProductGridWithFilters"/>
+        <amOnPage url="{{AdminProductIndexPage.url}}?filters[sku]=$createSimpleProduct.sku$" stepKey="navigateToProductGridWithFilters"/>
         <waitForPageLoad stepKey="waitForProductGrid"/>
+        <see selector="{{AdminProductGridSection.productGridNameProduct($createSimpleProduct.name$)}}" userInput="$createSimpleProduct.name$" stepKey="seeProduct"/>
         <waitForElementVisible selector="{{AdminProductGridFilterSection.enabledFilters}}" stepKey="waitForEnabledFilters"/>
         <seeElement selector="{{AdminProductGridFilterSection.enabledFilters}}" stepKey="seeEnabledFilters"/>
-        <see selector="{{AdminProductGridFilterSection.enabledFilters}}" userInput="Name: $createSimpleProduct.name$" stepKey="seeProductNameFilter"/>
+        <see selector="{{AdminProductGridFilterSection.enabledFilters}}" userInput="SKU: $createSimpleProduct.sku$" stepKey="seeProductNameFilter"/>
     </test>
 </tests>

app/code/Magento/Ui/view/base/web/js/grid/url-filter-applier.js

@@ -39,7 +39,7 @@ define([
         apply: function () {
             var urlFilter = this.getFilterParam(this.searchString),
                 applied,
-                filters = {};
+                filters;
 
             if (_.isUndefined(this.filterComponent())) {
                 setTimeout(function () {
@@ -51,7 +51,7 @@ define([
 
             if (Object.keys(urlFilter).length) {
                 applied = this.filterComponent().get('applied');
-                filters = $.extend(true, urlFilter, applied);
+                filters = $.extend({}, applied, urlFilter);
                 this.filterComponent().set('applied', filters);
             }
         },