[gnome-shell/gnome-3-28] overviewControls: Sync hover after drag operations

[Marco Trevisan <marcotrevi src gnome org>]

commit 0b82388c49bf9d47c55651b58a991e5050709919
Author: Florian Müllner <fmuellner gnome org>
Date:   Fri Jul 20 18:51:40 2018 +0000

    overviewControls: Sync hover after drag operations
    
    During global grabs, actors miss enter and leave events required
    for correct hover tracking. This can cause the workspace switcher
    to get stuck while slid out, so ensure the actor's hover state is
    synced after drag operations.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/161
    
    
    (cherry picked from commit 328c63bf64ef13f477156db2ae1c657957259130)

 js/ui/overviewControls.js | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/js/ui/overviewControls.js b/js/ui/overviewControls.js
index a2905abb9..1b1c9cf10 100644
--- a/js/ui/overviewControls.js
+++ b/js/ui/overviewControls.js
@@ -284,6 +284,11 @@ var ThumbnailsSlider = new Lang.Class({
         return child.get_theme_node().get_length('visible-width');
     },
 
+    _onDragEnd() {
+        this.actor.sync_hover();
+        this.parent();
+    },
+
     _getSlide() {
         if (!this._visible)
             return 0;