A list with forward slashes is inaccessible

[freefal]

Steps to reproduce:

1. Create a new todo list called foo/bar
2. Try to click on it

Expected behavior: Go to list foo/bar Actual behavior: Nothing happens

Looking at the filesystem server-side you'll see that a file called bar.txt is created in the data folder. If you do a refresh on the client, the list will appear as bar and be clickable.

Suggested fix: Fully escape list names