Focus window when opening uri using Wayland protocol

[lenemter]

No description provided.

[danirabbit]

@tintou commented here

I don't think that doing #348 is realistic, I'd look at what GNOME Shell is doing with focus stealing prevention, there is a timestamp that get sent when requesting an action, and we should be using this (i.e. link a keystroke/click with the timestamp of the window opening action)

[danirabbit]

Gonna close since #349 also works but is much simpler and uses built-in mechanisms