gui: Some browsers force lowercase attributes

gui/default/index.html

@@ -174,8 +174,8 @@
               <span ng-if="event.data.folderLabel.length == 0" translate translate-value-device="{{ deviceName(findDevice(event.data.device)) }}" translate-value-folder="{{ event.data.folder }}">
                 {%device%} wants to share folder "{%folder%}".
               </span>
-              <span ng-if="event.data.folderLabel.length != 0" translate translate-value-device="{{ deviceName(findDevice(event.data.device)) }}" translate-value-folder="{{ event.data.folder }}" translate-value-folderLabel="{{ event.data.folderLabel }}">
-                {%device%} wants to share folder "{%folderLabel%}" ({%folder%}).
+              <span ng-if="event.data.folderLabel.length != 0" translate translate-value-device="{{ deviceName(findDevice(event.data.device)) }}" translate-value-folder="{{ event.data.folder }}" translate-value-folderlabel="{{ event.data.folderLabel }}">
+                {%device%} wants to share folder "{%folderlabel%}" ({%folder%}).
               </span>
               <span translate ng-if="folders[event.data.folder]">Share this folder?</span>
               <span translate ng-if="!folders[event.data.folder]">Add new folder?</span>