[gnome-shell] workspacesView: Don't update secondary monitor thumbnails box if hidden

[Marge Bot <marge-bot src gnome org>]

commit 81210f584607f551de4e4d991e987fc57d309edb
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Wed May 12 11:55:34 2021 -0300

    workspacesView: Don't update secondary monitor thumbnails box if hidden
    
    And save quite a few C/JS trampolines. Since the thumbnails box may not
    have up-to-date properties, call _updateThumbnailParams() right after
    showing the thumbnails box.
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1845>

 js/ui/workspacesView.js | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/js/ui/workspacesView.js b/js/ui/workspacesView.js
index c2d023cc4f..6aa8b2615b 100644
--- a/js/ui/workspacesView.js
+++ b/js/ui/workspacesView.js
@@ -777,6 +777,7 @@ class SecondaryMonitorDisplay extends St.Widget {
             return;
 
         this._thumbnails.show();
+        this._updateThumbnailParams();
         this._thumbnails.ease_property('expand-fraction', visible ? 1 : 0, {
             duration: OverviewControls.SIDE_CONTROLS_ANIMATION_TIME,
             mode: Clutter.AnimationMode.EASE_OUT_QUAD,
@@ -785,6 +786,9 @@ class SecondaryMonitorDisplay extends St.Widget {
     }
 
     _updateThumbnailParams() {
+        if (!this._thumbnails.visible)
+            return;
+
         const { initialState, finalState, progress } =
             this._overviewAdjustment.getStateTransitionParams();