PB-108 add static styles to column line

Author: paras89

app/code/Magento/PageBuilder/view/adminhtml/pagebuilder/content_type/column-line.xml

@@ -31,6 +31,8 @@
                         <attribute name="name" source="data-content-type"/>
                         <attribute name="appearance" source="data-appearance"/>
                         <attribute name="grid_size" source="data-grid-size"/>
+                        <static_style source="display" value="flex"/>
+                        <static_style source="width" value="100%"/>
                     </element>
                 </elements>
             </appearance>

app/code/Magento/PageBuilder/view/adminhtml/web/template/content-type/column-line/default/master.html

@@ -7,6 +7,7 @@
 
 <div class="pagebuilder-column-line"
      attr="data.main.attributes"
+     ko-style="data.main.style"
      css="data.main.css">
     <render args="masterTemplate"></render>
 </div>