Restrict ability to edit backup restrictions

Author: Kristan Kenney

web/templates/admin/list_backup.html

@@ -2,7 +2,11 @@
       <div class="l-sort clearfix noselect">
         <div class="l-unit-toolbar__buttonstrip">
           <a href="/schedule/backup/?token=<?=$_SESSION['token']?>" class="ui-button cancel" dir="ltr"><i class="fas fa-plus-circle status-icon green"></i><?=_('Create Backup')?></a>
-          <a href="/list/backup/exclusions/" class="ui-button cancel" dir="ltr"><i class="fas fa-folder-minus status-icon orange"></i><?=_('backup exclusions')?></a>
+          <? if (($_SESSION['userContext'] === 'admin') && ($_SESSION['look'] === 'admin')) {?>
+            <!-- Restrict ability to edit backup exclusions when impersonating 'admin' account -->
+          <? } else { ?>
+            <a href="/list/backup/exclusions/" class="ui-button cancel" dir="ltr"><i class="fas fa-folder-minus status-icon orange"></i><?=_('backup exclusions')?></a>
+          <? } ?> 
         </div>
         <div class="l-sort-toolbar clearfix">
           <table>