bug#49775: can't type in Matrix ID in Nheko

[raingloom]

Like the subject says. I can't type in anything, can't paste anything,
it's broken.
The other fields in the login screen work as expected.

Our version of Nheko is quite old though, so someone should update it.
I attempted it recently but got stuck with a new dependency. I might
give it another go but it might be a while, so if you know how to do
it, don't wait for me.