MAGETWO-37133: Variation grid on the Main page of PCF

- MAGETWO-39740: Incorrect steps description in wizard according to UX pdf doc

Author: Andrii Lugovyi

app/code/Magento/ConfigurableProduct/view/adminhtml/templates/catalog/product/edit/attribute/steps/attributes_values.phtml

@@ -11,7 +11,7 @@
 <div data-bind="scope: '<?= $block->getComponentName()?>'">
     <h2 class="steps-wizard-title"><?= __('Step 2: Attribute Values') ?></h2>
     <div class="steps-wizard-info">
-        <span><?= __('Select values from each attribute to include in this product. Each unique combination of values creates a unigue.') ?></span>
+        <span><?= __('Select values from each attribute to include in this product. Each unique combination of values creates a unigue product SKU.') ?></span>
     </div>
     <div data-bind="foreach: attributes, sortableList: attributes">