[gnome-shell/gnome-3-38] appDisplay: don't change grid page on adaptToSize

[Florian Müllner <fmuellner src gnome org>]

commit 69d656d88a73abd3652b4b8fedf32ad133bc1018
Author: Daniel García Moreno <danigm endlessos org>
Date:   Thu Nov 12 10:38:17 2020 +0100

    appDisplay: don't change grid page on adaptToSize
    
    If the adapt to size occurs after the grid page has been changed the
    page is set to zero. This patch just keep the current page with the same
    value that it has before.
    
    Fix https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3388
    
    (cherry picked from commit 8eec7ae2d8a19ef267140bfb00cda974b55faddd)

 js/ui/appDisplay.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/js/ui/appDisplay.js b/js/ui/appDisplay.js
index 920fde3e95..06a5052b07 100644
--- a/js/ui/appDisplay.js
+++ b/js/ui/appDisplay.js
@@ -840,9 +840,9 @@ var BaseAppView = GObject.registerClass({
             this._pageIndicators.nPages !== this._grid.nPages) {
             Meta.later_add(Meta.LaterType.BEFORE_REDRAW, () => {
                 this._adjustment.value = 0;
-                this._grid.currentPage = 0;
+                this.goToPage(this._grid.currentPage);
                 this._pageIndicators.setNPages(this._grid.nPages);
-                this._pageIndicators.setCurrentPosition(0);
+                this._pageIndicators.setCurrentPosition(this._grid.currentPage);
                 return GLib.SOURCE_REMOVE;
             });
         }