[TASK] Make CreateJob button on index page in backend module admin only

To prevent users from clicking the "Create New" button on the index
page of the backend module, we make this button admin only

Classes/Controller/BackendController.php

@@ -103,6 +103,7 @@ class BackendController extends ActionController {
 				$this->view->assign('pageUid', $pageUid);
 			} else {
 				$this->view->assign('noRecords', 1);
+				$this->view->assign('isAdmin', $GLOBALS['BE_USER']->isAdmin());
 				$this->addFlashMessage(
 					LocalizationUtility::translate('backend.notice.noRecords', 'SgJobs'), '', FlashMessage::INFO
 				);

Resources/Private/Backend/Templates/Index.html

@@ -53,7 +53,9 @@
 		</f:then>
 		<f:else>
 			<f:render partial="SelectRoot" arguments="{pages: pages}" />
-			<f:render partial="CreateJob" arguments="{pageUid:pageUid}" />
+			<f:if condition="{isAdmin}">
+				<f:render partial="CreateJob" arguments="{pageUid:pageUid}" />
+			</f:if>
 		</f:else>
 	</f:if>