[gnome-shell] Make key-above-tab in switcher more consistent

[Florian Müllner <fmuellner src gnome org>]

commit 9f0bb526f7abac137b7d3cbaca9e41b23f29fd3d
Author: Didier Roche <didrocks ubuntu com>
Date:   Thu Sep 14 09:30:16 2017 +0200

    Make key-above-tab in switcher more consistent
    
    Ensure that key-above-tab for selecting window application is consistent
    with the down key.
    After focus an application in the switcher:
    - if you press down, the window thumbnails are previewed, and first element
      is selected
    - if you press key-above-tab, the window thumbnails are previewed, however
      the second element is directly selected.
    Make both interactions always select the first element.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=786009

 js/ui/altTab.js |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/js/ui/altTab.js b/js/ui/altTab.js
index 265d81a..273bfd3 100644
--- a/js/ui/altTab.js
+++ b/js/ui/altTab.js
@@ -158,7 +158,10 @@ var AppSwitcherPopup = new Lang.Class({
 
     _keyPressHandler: function(keysym, action) {
         if (action == Meta.KeyBindingAction.SWITCH_GROUP) {
-            this._select(this._selectedIndex, this._nextWindow());
+            if (!this._thumbnailsFocused)
+                this._select(this._selectedIndex, 0);
+            else
+                this._select(this._selectedIndex, this._nextWindow());
         } else if (action == Meta.KeyBindingAction.SWITCH_GROUP_BACKWARD) {
             this._select(this._selectedIndex, this._previousWindow());
         } else if (action == Meta.KeyBindingAction.SWITCH_APPLICATIONS) {