make button focus ring conditional on tab press

shell/ferese-shell/src/main.rs

@@ -368,6 +368,7 @@ impl cosmic::Application for FereseShell {
                     .load(Ordering::Relaxed)
                     .then_some(Message::Event(event, id)),
                 Event::Keyboard(_)
+                | Event::Mouse(cosmic::iced::mouse::Event::ButtonPressed(_))
                 | Event::Window(window::Event::Opened { .. } | window::Event::Closed)
                 | Event::PlatformSpecific(PlatformSpecific::Wayland(
                     wayland::Event::Popup(..) | wayland::Event::Layer(..) | wayland::Event::Output(..),