URL field for FAV icon

[hosting-gl]

To fully brand the panel, it would be nice to have a field to put an url for the FAV icon also :)

[hosting-gl]

The title field as well, right now it says "Stalwart Management" That would be a nice field to be able to control also for the branding :)

[rcfa]

In the same vein: it would be nice if the server could serve a small number of resources: company logos for e-mail signatures, BIMI svg files, etc. such that one doesn’t have to set up an entire web server for what’s maybe a half dozen tiny files….