Manage site styles breaks when all styles match

[jacekkopecky]

Description

The "Manage site styles" function breaks when all styles you have are for the given site.

Steps to replicate:

1. Install the extension in a new profile
2. Make only one style for some site
3. In the popup, go to Manage Site Styles (not just Manage)

You'd expect to see the style you made, but the manage.html page misbehaves, as shown below.

It's because filters.js line 202 returns without ever putting container inside installed.

System Information

• OS: MacOS
• Browser: Chrome 134
• Stylus Version: 2.3.14, also master branch

Screenshot