appDisplay: Add org.freedesktop.MalcontentControl to Utilities

malcontent-control is now a standalone app that is displayed in Shell Overview.
Let's place it in the Utilities folder instead of taking up space (and confusing users)
in the main app grid

Closes: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/8124
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3579>

js/ui/appDisplay.js

@@ -70,6 +70,7 @@ const DEFAULT_FOLDERS = {
             'org.gnome.FileRoller.desktop',
             'org.gnome.font-viewer.desktop',
             'org.gnome.Loupe.desktop',
+            'org.freedesktop.MalcontentControl.desktop',
             'org.gnome.seahorse.Application.desktop',
             'org.gnome.tweaks.desktop',
             'org.gnome.Usage.desktop',