status/backgroundApps: Add section title

At least for the time being, the background portal's app monitor
only supports flatpak apps, which are the only apps where we can
reliably match processes to .desktop files and assume that they
belong to graphical apps.

To indicate that there may well be apps that don't appear in the
list despite running in the background, add a clarifying section
title.

https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/6400

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2681>

1 files changed, 9 insertions, 0 deletions

diff --git a/js/ui/status/backgroundApps.js b/js/ui/status/backgroundApps.js
index 606fa3348..49878c134 100644
--- a/js/ui/status/backgroundApps.js
+++ b/js/ui/status/backgroundApps.js
@@ -146,6 +146,14 @@ class BackgroundAppsToggle extends QuickToggle {
             null,
             Gio.DBusProxyFlags.DO_NOT_AUTO_START);
 
+        this._listTitle = new PopupMenu.PopupMenuItem(
+            _('Apps known to be running without a window'),
+            {reactive: false});
+        this._listTitle.label.clutter_text.set({
+            line_wrap: true,
+        });
+        this.menu.addMenuItem(this._listTitle);
+
         this._appsSection = new PopupMenu.PopupMenuSection();
         this.menu.addMenuItem(this._appsSection);
 
@@ -183,6 +191,7 @@ class BackgroundAppsToggle extends QuickToggle {
                 '%d Background App',
                 '%d Background Apps',
                 nBackgroundApps).format(nBackgroundApps);
+        this._listTitle.visible = nBackgroundApps > 0;
 
         this._appsSection.removeAll();