[gnome-shell] layout: Use an invisible but mapped actor as dummy cursor

[Florian Müllner <fmuellner src gnome org>]

commit 746875258dba5fbb1eac802b14732049e9b1c518
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Mon Mar 4 17:39:54 2019 -0600

    layout: Use an invisible but mapped actor as dummy cursor
    
    Since this could be used as boxpointer source, it should be marked as mapped,
    or it will be ignored.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/435

 js/ui/layout.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/js/ui/layout.js b/js/ui/layout.js
index e3c93a923..30e750dc5 100644
--- a/js/ui/layout.js
+++ b/js/ui/layout.js
@@ -252,7 +252,7 @@ var LayoutManager = GObject.registerClass({
 
         // A dummy actor that tracks the mouse or text cursor, based on the
         // position and size set in setDummyCursorGeometry.
-        this.dummyCursor = new St.Widget({ width: 0, height: 0, visible: false });
+        this.dummyCursor = new St.Widget({ width: 0, height: 0, opacity: 0 });
         this.uiGroup.add_actor(this.dummyCursor);
 
         global.stage.remove_actor(global.top_window_group);