Going to “absolutely” wrong path in path routing doesn’t redirect to the root

[dariadomagala-sap]

Expected result

After going to an "absolutely" wrong path when using path routing (e.g. myapp.com/non-existing-path), Luigi should show an error message, and redirect user to the root.

Actual result

Going to a wrong path shows an error message, but doesn't redirect to the root.

Steps to reproduce

• open a Luigi app with a path routing
• go to a non-existing path
• error is shown but no redirection

[parostatkiem-zz]

Works on both types of routing now.
PR: #310