I am using FileZilla from 2 years at my workplace, I work in a web agency and I have to deal with hundreds of websites, switching from one to another to apply changes. One thing that always annoys me (and that I would like added to FileZilla's user interface) is the missing search functionality in the Site Manager: I have a lot of websites and I have to scroll every time, but with a search I could find websites more quickly. The following image shows what I mean:

What do you think? No one else has got my own thoughts?
Thanks!