Text entry should be focused by default on each page
openqa.gnome.org runs gnome-initial-setup and attempts to enter a timezone without first clicking the timezone entry widget. This used to work, but no longer does (perhaps a regression from gtk4 port).
Example of the test failure: https://openqa.gnome.org/tests/122#step/gnome_welcome/6
We should set the text entry to be focused when the page appears.