[gnome-shell] dash: Fix 'All apps' button position in RTL locales

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

commit 0a2372136437b093b59a5ce120c38a80c8d7a83f
Author: Abderrahim Kitouni <akitouni gnome org>
Date:   Sat Jan 16 18:45:07 2021 +0100

    dash: Fix 'All apps' button position in RTL locales
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1559>

 js/ui/dash.js | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)
---
diff --git a/js/ui/dash.js b/js/ui/dash.js
index a4dc7a8fb5..3d6e756232 100644
--- a/js/ui/dash.js
+++ b/js/ui/dash.js
@@ -295,16 +295,27 @@ class DashActor extends St.Widget {
 
         let [appIcons, showAppsButton] = this.get_children();
         const [, showAppsNatWidth] = showAppsButton.get_preferred_width(availHeight);
+        const rtl = this.text_direction === Clutter.TextDirection.RTL;
 
         let childBox = new Clutter.ActorBox();
-        childBox.x1 = contentBox.x1;
         childBox.y1 = contentBox.y1;
-        childBox.x2 = contentBox.x2 - showAppsNatWidth;
         childBox.y2 = contentBox.y2;
+        if (rtl) {
+            childBox.x1 = contentBox.x1 + showAppsNatWidth;
+            childBox.x2 = contentBox.x2;
+        } else {
+            childBox.x1 = contentBox.x1;
+            childBox.x2 = contentBox.x2 - showAppsNatWidth;
+        }
         appIcons.allocate(childBox);
 
-        childBox.x1 = contentBox.x2 - showAppsNatWidth;
-        childBox.x2 = contentBox.x2;
+        if (rtl) {
+            childBox.x1 = contentBox.x1;
+            childBox.x2 = contentBox.x1 + showAppsNatWidth;
+        } else {
+            childBox.x1 = contentBox.x2 - showAppsNatWidth;
+            childBox.x2 = contentBox.x2;
+        }
         showAppsButton.allocate(childBox);
     }