[gnome-shell] dash: Only show separator when there are running apps

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

commit 151a104f9a48439896f32de233d8eea6b6c1b384
Author: Florian Müllner <fmuellner gnome org>
Date:   Fri Jan 29 19:03:07 2021 +0100

    dash: Only show separator when there are running apps
    
    The separator is only really needed to distinguish favorite apps
    from running apps, the show-apps button is distinct enough already.
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1610>

 js/ui/dash.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/js/ui/dash.js b/js/ui/dash.js
index 2d329ae91e..16893f9765 100644
--- a/js/ui/dash.js
+++ b/js/ui/dash.js
@@ -745,7 +745,8 @@ var Dash = GObject.registerClass({
 
         // Update separator
         const nFavorites = Object.keys(favorites).length;
-        if (nFavorites > 0) {
+        const nIcons = children.length - removedActors.length;
+        if (nFavorites > 0 && nFavorites < nIcons) {
             if (!this._separator) {
                 this._separator = new St.Widget({
                     style_class: 'dash-separator',