[gnome-games] display-view: Ignore savestates shortcuts if runner doesn't support savestates

[Alexander Mikhaylenko <alexm src gnome org>]

commit 370a5e0c919d5af4631cc1ccc93ebb9e183b5b43
Author: Yetizone <andreii lisita gmail com>
Date:   Thu Aug 15 16:23:12 2019 +0300

    display-view: Ignore savestates shortcuts if runner doesn't support savestates
    
    Fixes https://gitlab.gnome.org/GNOME/gnome-games/issues/227

 src/ui/display-view.vala | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/ui/display-view.vala b/src/ui/display-view.vala
index bbb25ca5..399d1098 100644
--- a/src/ui/display-view.vala
+++ b/src/ui/display-view.vala
@@ -134,6 +134,9 @@ private class Games.DisplayView : Object, UiView {
                }
 
                // Shortcuts for the Savestates manager
+               if (!box.runner.supports_savestates)
+                       return false;
+
                if (savestates_list_state.is_revealed)
                        return false;