Blank user info on logout

Signed-off-by: James Ketrenos <james_git@ketrenos.com>

frontend/src/ketr-photos/ketr-photos.html

@@ -666,7 +666,7 @@
 
         logout: function(event) {
           window.fetch("api/v1/users/logout", function(error, xhr) {
-            this.user = null;
+            this.user = this.name = this.password = this.username = this.who = null;
           }.bind(this));
         },