We were just creating a window without showing it. However, wayland does
not respect this setting, so it seemed to work.

Now we actually activate the window :)

Rather than changing the single call-site, we always do this when
calling `Workspace::new_local`, since there were no code paths in the
repo that pass `NewWindow` without immediately activating it

Release Notes:

- N/A or Added/Fixed/Improved ...