ncp-web: check for possibly missing index

Signed-off-by: nachoparker <nacho@ownyourbits.com>

changelog.md

@@ -1,11 +1,13 @@
 
-[v1.23.0](https://github.com/nextcloud/nextcloudpi/commit/a670258) (2020-03-13) upgrade to NC18.0.2
+[v1.23.1](https://github.com/nextcloud/nextcloudpi/commit/317c2aa) (2020-03-15) ncp-web: check for possibly missing index
 
-[v1.22.3](https://github.com/nextcloud/nextcloudpi/commit/76d5da3) (2020-03-02) nc-snapshot-auto: read datadir location during execution
+[v1.23.0](https://github.com/nextcloud/nextcloudpi/commit/d108fad) (2020-03-13) upgrade to NC18.0.2
 
-[v1.22.2 ](https://github.com/nextcloud/nextcloudpi/commit/75b1a06) (2020-03-02) nc-maintenance: add is_active
+[v1.22.3 ](https://github.com/nextcloud/nextcloudpi/commit/c09dfd9) (2020-03-02) nc-snapshot-auto: read datadir location during execution
 
-[v1.22.1 ](https://github.com/nextcloud/nextcloudpi/commit/49de98b) (2020-03-03) samba: option to apply only to a NC group (#1048)
+[v1.22.2 ](https://github.com/nextcloud/nextcloudpi/commit/f71c8c8) (2020-03-02) nc-maintenance: add is_active
+
+[v1.22.1 ](https://github.com/nextcloud/nextcloudpi/commit/c49c390) (2020-03-03) samba: option to apply only to a NC group (#1048)
 
 [v1.22.0 ](https://github.com/nextcloud/nextcloudpi/commit/9304c86) (2020-03-03) Add nc-trusted-proxies (#1094)
 

ncp-web/index.php

@@ -235,13 +235,13 @@
           <div id="loading-info-gif" class="loading-section-gif"> <img src="img/loading-small.gif"> </div>
         </div>
 
-        <div id="backups-wrapper" class="content-box <?php if($_GET['app'] != 'backups') echo 'hidden';?>">
+        <div id="backups-wrapper" class="content-box <?php if(array_key_exists('app',$_GET) && ($_GET['app'] != 'backups')) echo 'hidden';?>">
           <h2 class="text-title"><?php echo $l->__("Backups"); ?></h2>
           <div id="backups-content" class="table-wrapper"></div>
           <div id="loading-backups-gif" class="loading-section-gif"> <img src="img/loading-small.gif"> </div>
         </div>
 
-        <div id="nc-config-wrapper" class="content-box <?php if($_GET['app'] != 'config') echo 'hidden';?>">
+        <div id="nc-config-wrapper" class="content-box <?php if(array_key_exists('app',$_GET) && ($_GET['app'] != 'config')) echo 'hidden';?>">
           <h2 class="text-title"><?php echo $l->__("Nextcloud configuration"); ?></h2>
           <div id="nc-config-box" class="table-wrapper">
 <?php