Comment 6 for bug 1321088

Nothing ever calls "begin_user_resizable" in UpdateManager/UpdateManager.py, which is probably an oversight.

Simply killing off the self.set_resizable(False) in end_user_resizable() makes things work; there's really no need to make the window a fixed size, nothing breaks, and it makes monitor progress during download and install much more straightforward than with a fixed-size window.

Of course, being gnome software, there's no chance that a straightforward hack will ever be applied, preferring to leave things broken in a less useful manner until a "proper" fix can be developed (which won't happen, instead in 4 years someone will write a replacement with another set of broken features, and so the lifecycle of free software continues).