[gnome-shell] workspace: Reset window opacity after overview transitions

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 2a0c11675745b519b766cd6273519b5141b46a4d
Author: Florian Müllner <fmuellner gnome org>
Date:   Sat Jul 11 17:49:04 2020 +0200

    workspace: Reset window opacity after overview transitions
    
    When using the fade animation when transitioning to the overview instead
    of zoom, we fade out all window previews to fully transparent. But after
    commit 751189253a removed the old _updateWindowPositions() function,
    nothing resets the opacity again, so when switching from the app- to the
    window picker, all previews are hidden.
    
    Fix this by always resetting the window preview opacity after showing
    or hiding the overview.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2969

 js/ui/workspace.js | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/js/ui/workspace.js b/js/ui/workspace.js
index bbf61da33c..164084a884 100644
--- a/js/ui/workspace.js
+++ b/js/ui/workspace.js
@@ -1194,10 +1194,12 @@ class Workspace extends St.Widget {
 
     _doneLeavingOverview() {
         this.layout_manager.layout_frozen = false;
+        this._windows.forEach(w => (w.opacity = 255));
     }
 
     _doneShowingOverview() {
         this.layout_manager.layout_frozen = false;
+        this._windows.forEach(w => (w.opacity = 255));
     }
 
     _isMyWindow(window) {