Implement post-match screen and match finishing. (#76)

Reviewed-on: #76
Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>

src/menus/navigation.rs

@@ -102,7 +102,7 @@ pub fn process_inputs(
                 .insert(DirectionalNavigationAction::Right);
         }
     }
-    if input.accept.is_pressed() {
+    if input.accept.is_just_pressed() {
         action_state
             .pressed_actions
             .insert(DirectionalNavigationAction::Select);