When linking to something before it exists, like db/postgres from "home" and then clicking through to the dialogue to create the new page, you end up with an unlocalized page creation dialog that you can still use. Upon clicking through and creating the page, when you attempt to save, you receive an SQL error. This is potentially due to the db section being mistaken for the locale.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'home'
2. Edit the page to add a link to a new "short" virtual folder/page that does not yet exist, like db/postgres
3. Click through the creation dialog
4. Attempt to save the page and capture the error

Expected behavior
Throw an error for unsupported locale/action. The modal for creating a new pages does not permit short paths that would conflict with this locales, which may be good enough, but I wanted to raise this issue if folks though it would be helpful to trap it.

Screenshots

Host Info (please complete the following information):

• OS: Docker, requarks/wiki:2
• Wiki.js version: 2.0.12
• Database engine: MariaDB 10.4.7-MariaDB-1:10.4.7+maria~bionic

Additional context
Again, this is an edge case that I'm not sure that many folks will hit, so it might not be worth the code to fix/prevent, but I wanted to let you know. Thanks for the cool project!