Delete empty _2fDevices session key

lemonldap-ng-manager/site/coffee/sessions.coffee

@@ -207,8 +207,7 @@ llapp.controller 'SessionsExplorerCtrl', ['$scope', '$translator', '$location',
 			# 2. Push session keys in result, grouped by categories
 			for category, attrs of categories
 				subres = []
-				for attr in attrs
-				
+				for attr in attrs		
 					if session[attr]  and session[attr].match(/\w+/)
 						if session[attr].match(/"type":\s*"(?:TOTP|U2F|UBK)"/)
 							subres.push
@@ -235,6 +234,8 @@ llapp.controller 'SessionsExplorerCtrl', ['$scope', '$translator', '$location',
 								value: session[attr]
 								epoch: ''
 							delete session[attr]
+					else
+						delete session[attr]
 				if subres.length >0
 					res.push
 						title: "__#{category}__"

lemonldap-ng-manager/site/htdocs/static/js/sessions.js

@@ -1,4 +1,4 @@
-// Generated by CoffeeScript 1.9.3
+// Generated by CoffeeScript 1.10.0
 
 /*
  * Session explorer
@@ -277,6 +277,8 @@
                   });
                   delete session[attr];
                 }
+              } else {
+                delete session[attr];
               }
             }
             if (subres.length > 0) {