Merge remote-tracking branch 'remotes/Tango-CE/MAGETWO-44689' into MAGETWO-44772_pr_bugs

Author: Oleh Posyniak

app/code/Magento/Backend/view/adminhtml/layout/default.xml

@@ -67,9 +67,6 @@
                 </container>
             </container>
         </referenceContainer>
-        <referenceContainer name="backend.page">
-            <block class="Magento\Framework\View\Element\Template" name="page.loader" template="Magento_Backend::admin/loader.phtml" after="-"/>
-        </referenceContainer>
         <referenceContainer name="after.body.start">
             <block class="Magento\RequireJs\Block\Html\Head\Config" name="requirejs-config"/>
             <block class="Magento\Translation\Block\Html\Head\Config" name="translate-config"/>