properly update button's animation duration on reconfiguration

kdecoration/breezebutton.cpp

@@ -47,8 +47,11 @@ namespace Breeze
 
         // connections
         connect(decoration->client().data(), SIGNAL(iconChanged(QIcon)), this, SLOT(update()));
+        connect(decoration->settings().data(), &KDecoration2::DecorationSettings::reconfigured, this, &Button::reconfigure);
         connect( this, &KDecoration2::DecorationButton::hoveredChanged, this, &Button::updateAnimationState );
 
+        reconfigure();
+
     }
 
     //__________________________________________________________________
@@ -434,6 +437,16 @@ namespace Breeze
 
     }
 
+    //________________________________________________________________
+    void Button::reconfigure()
+    {
+
+        // animation
+        auto d = qobject_cast<Decoration*>(decoration());
+        if( d )  m_animation->setDuration( d->internalSettings()->animationsDuration() );
+
+    }
+
     //__________________________________________________________________
     void Button::updateAnimationState( bool hovered )
     {

kdecoration/breezebutton.h

@@ -96,6 +96,9 @@ namespace Breeze
 
         private Q_SLOTS:
 
+        //* apply configuration changes
+        void reconfigure();
+
         //* animation state
         void updateAnimationState(bool);