Restore dock widget from settings, fixed frameless widget restore

https://discordapp.com/channels/539048679160676382/539486309882789888/593835010566521033

src/blackgui/dockwidget.cpp

@@ -280,6 +280,15 @@ namespace BlackGui
         this->setFrameless(!frameless);
     }
 
+    void CDockWidget::toggleFramelessDeferred(int delayMs)
+    {
+        QPointer<CDockWidget> myself(this);
+        QTimer::singleShot(delayMs, this, [ = ]
+        {
+            if (myself) { myself->toggleFrameless(); }
+        });
+    }
+
     void CDockWidget::windowAlwaysOnTop()
     {
         if (this->isFloating())
@@ -317,16 +326,17 @@ namespace BlackGui
         {
             this->toggleFloating();
         }
-        if (s.isFramless() != this->isFrameless())
-        {
-            this->toggleFrameless();
-        }
         const QByteArray geo(s.getGeometry());
         if (!geo.isEmpty())
         {
             const bool ok = this->restoreGeometry(geo);
             if (ok) { this->rememberFloatingSizeAndPosition(); }
         }
+        if (s.isFramless() != this->isFrameless())
+        {
+            // not working if directly called
+            this->toggleFramelessDeferred();
+        }
         this->setMargins();
         return true;
     }

src/blackgui/dockwidget.h

@@ -108,6 +108,9 @@ namespace BlackGui
         //! Toggle frameless mode
         void toggleFrameless();
 
+        //! Toggle frameless deferred
+        void toggleFramelessDeferred(int delayMs = 1000);
+
         //! Window always on top
         void windowAlwaysOnTop();