[gnome-shell] overview: Minor cleanup

[Florian Müllner <fmuellner src gnome org>]

commit ce63d21dcc141912232185b1c90de9a88a6ddf02
Author: Florian Müllner <fmuellner gnome org>
Date:   Tue Aug 20 04:25:24 2019 +0200

    overview: Minor cleanup
    
    Safe one indentation level by combining conditions.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/710

 js/ui/overview.js | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)
---
diff --git a/js/ui/overview.js b/js/ui/overview.js
index 1325eff6b5..49907b9d29 100644
--- a/js/ui/overview.js
+++ b/js/ui/overview.js
@@ -481,15 +481,13 @@ var Overview = class {
 
         if (this._shown) {
             let shouldBeModal = !this._inXdndDrag;
-            if (shouldBeModal) {
-                if (!this._modal) {
-                    if (Main.pushModal(this._overview,
-                                       { actionMode: Shell.ActionMode.OVERVIEW })) {
-                        this._modal = true;
-                    } else {
-                        this.hide();
-                        return false;
-                    }
+            if (shouldBeModal && !this._modal) {
+                let actionMode = Shell.ActionMode.OVERVIEW;
+                if (Main.pushModal(this._overview, { actionMode })) {
+                    this._modal = true;
+                } else {
+                    this.hide();
+                    return false;
                 }
             }
         } else {