[gnome-shell/wip/carlosg/fix-warning] workspacesView: sync gesture enabled state after setting it up completely

[Carlos Garnacho <carlosg src gnome org>]

commit 59edea4bb4e0b2ccbb07fe4fc2b5808641219344
Author: Carlos Garnacho <carlosg gnome org>
Date:   Fri Apr 19 18:52:53 2019 +0200

    workspacesView: sync gesture enabled state after setting it up completely
    
    At the point it is disabled, it has got signal handlers connected but
    this._workspacesView is uninitialized. This triggers:
    
    (gnome-shell:3993): Gjs-WARNING **: 18:49:53.281: JS ERROR: Exception in callback for signal: cancel: 
TypeError: this._workspacesViews is undefined
    _endTouchGesture@resource:///org/gnome/shell/ui/workspacesView.js:527:25
    _emit@resource:///org/gnome/gjs/modules/signals.js:142:27
    set enabled@resource:///org/gnome/shell/ui/windowManager.js:478:13
    WorkspacesDisplay<@resource:///org/gnome/shell/ui/workspacesView.js:482:9
    ViewSelector<@resource:///org/gnome/shell/ui/viewSelector.js:167:35
    ControlsManager<@resource:///org/gnome/shell/ui/overviewControls.js:405:29
    init@resource:///org/gnome/shell/ui/overview.js:234:26
    _initializeUI@resource:///org/gnome/shell/ui/main.js:184:5
    start@resource:///org/gnome/shell/ui/main.js:124:5
    @<main>:1:31
    
    On startup. Shuffling these two lines prevent this from happening.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/506

 js/ui/workspacesView.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/js/ui/workspacesView.js b/js/ui/workspacesView.js
index f63178167..fe06d9dae 100644
--- a/js/ui/workspacesView.js
+++ b/js/ui/workspacesView.js
@@ -479,12 +479,12 @@ var WorkspacesDisplay = class {
         this.actor.connect('notify::mapped', () => {
             switchGesture.enabled = this.actor.mapped;
         });
-        switchGesture.enabled = this.actor.mapped;
 
         this._primaryIndex = Main.layoutManager.primaryIndex;
 
         this._workspacesViews = [];
         this._primaryScrollAdjustment = null;
+        switchGesture.enabled = this.actor.mapped;
 
         this._settings = new Gio.Settings({ schema_id: MUTTER_SCHEMA });
         this._settings.connect('changed::workspaces-only-on-primary',