Broken instance panel formatting

Version: Own branch based on 9ccc6174 with features/favicons (8fe9ff3f) and eugenijm/direct-conversations (0ec8f77c) merged in.

What I get

What I expect

Trying to reproduce

• webkit-gtk: Happens in normal, not in devtools after a reload
• firefox: Happens in normal, not in devtools after a reload, seems to unbreak with caching
• chromium: Happens in both