MAGETWO-91924: Jenkins - MFTF Button Failures

- Add default value to text_align to fix hasChanges bug
- Update ActionGroups being used to set text_align in Buttons

Author: tjwiebell

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

@@ -24,6 +24,11 @@
             <collapsible>true</collapsible>
         </settings>
         <field name="text_align" sortOrder="10" formElement="select">
+            <argument name="data" xsi:type="array">
+                <item name="config" xsi:type="array">
+                    <item name="default" xsi:type="string">default</item>
+                </item>
+            </argument>
             <settings>
                 <dataType>text</dataType>
                 <label translate="true">Alignment</label>

dev/tests/acceptance/tests/functional/Magento/FunctionalTest/PageBuilder/Test/AdminPageBuilderButtonsTest.xml

@@ -596,7 +596,7 @@
         <actionGroup ref="expandConfigurationSection" stepKey="expandConfigurationSection"/>
         <!-- Update Values -->
         <comment userInput="Update Values" stepKey="commentUpdateValues"/>
-        <actionGroup ref="selectSlideOutPanelField" stepKey="enterAlignment">
+        <actionGroup ref="selectAlignment" stepKey="enterAlignment">
             <argument name="property" value="PageBuilderAdvancedAlignmentPropertyCenter"/>
         </actionGroup>
         <actionGroup ref="selectSlideOutPanelField" stepKey="enterBorder">
@@ -733,7 +733,7 @@
         <actionGroup ref="expandConfigurationSection" stepKey="expandConfigurationSection"/>
         <!-- Update Values -->
         <comment userInput="Update Values" stepKey="commentUpdateValues"/>
-        <actionGroup ref="selectSlideOutPanelField" stepKey="enterAlignment">
+        <actionGroup ref="selectAlignment" stepKey="enterAlignment">
             <argument name="property" value="PageBuilderAdvancedAlignmentPropertyCenter"/>
         </actionGroup>
         <actionGroup ref="selectSlideOutPanelField" stepKey="enterBorder">