MAGETWO-90881: Implementation of mechanism (js, less/css, templates, images)

 - added implementation of Visual Select for alignment

Author: Robert He

app/code/Magento/PageBuilder/etc/adminhtml/di.xml

@@ -102,7 +102,7 @@
             </argument>
         </arguments>
     </type>
-    <virtualType name="Magento\PageBuilder\Model\Source\Alignment" type="Magento\PageBuilder\Model\Source\VisualSelect">
+    <virtualType name="AlignmentSource" type="Magento\PageBuilder\Model\Source\VisualSelect">
         <arguments>
             <argument name="optionsSize" xsi:type="string">small</argument>
             <argument name="optionsData" xsi:type="array">

app/code/Magento/PageBuilder/view/adminhtml/ui_component/pagebuilder_base_form.xml

@@ -32,7 +32,7 @@
             <formElements>
                 <select>
                     <settings>
-                        <options class="Magento\PageBuilder\Model\Source\Alignment"/>
+                        <options class="AlignmentSource"/>
                     </settings>
                 </select>
             </formElements>