[TASK] EXT: viewpage: Reload button

The reload button in DocHeader within the viewpage backend module
should not reload the whole content area but only the iframe location.

Change-Id: I03e2e6fe0b1be07465035f8e19da931515bb767c
Fixes: #37916
Releases: 6.0
Reviewed-on: http://review.typo3.org/11946
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer

typo3/sysext/viewpage/Resources/Private/Layouts/DocHeader.html

@@ -11,7 +11,7 @@
 				<div class="docheader-row1-left">
 				</div>
 				<div class="docheader-row2-right">
-					<f:be.buttons.icon uri="" icon="actions-system-refresh" />
+					<f:be.buttons.icon uri="javascript:document.getElementById('tx_viewpage_iframe').contentWindow.location.reload(true);" icon="actions-system-refresh" />
 					<f:be.buttons.shortcut />
 				</div>
 			</div>