Make the sizegrip into a square

kdecoration/breezedecoration.cpp

@@ -565,7 +565,7 @@ void Decoration::paint(QPainter *painter, const QRect &repaintRegion)
                 painter->setPen( c->color( ColorGroup::Active, ColorRole::TitleBar ) );
                 QPointF p=rect().bottomRight()+QPointF(0.5, 0.5);
                 // Unfortunately SizeGrip::GripSize is private
-                const int sizeGripSize = 18; //SizeGrip::GripSize;
+                const int sizeGripSize = 10; //SizeGrip::GripSize;
                 QPointF q=p-QPoint(0, sizeGripSize);
                 QPointF r=p-QPoint(sizeGripSize, 0);
                 painter->drawLine( p, q );

kdecoration/breezesizegrip.cpp

@@ -41,7 +41,7 @@ SizeGrip::SizeGrip(Decoration *decoration)
     setFixedSize(QSize(GripSize, GripSize));
 
     // mask
-    setMask(QRegion(QVector<QPoint>{QPoint(0, GripSize), QPoint(GripSize, 0), QPoint(GripSize, GripSize), QPoint(0, GripSize)}));
+    setMask(QRegion(QVector<QPoint>{QPoint(0, GripSize), QPoint(0,0), QPoint(GripSize, 0), QPoint(GripSize, GripSize), QPoint(0, GripSize)}));
 
     // embed
     embed();
@@ -126,7 +126,7 @@ void SizeGrip::paintEvent(QPaintEvent *)
     painter.setBrush(backgroundColor);
 
     // polygon
-    painter.drawPolygon(QVector<QPoint>{QPoint(0, GripSize), QPoint(GripSize, 0), QPoint(GripSize, GripSize), QPoint(0, GripSize)});
+    painter.drawPolygon(QVector<QPoint>{QPoint(0, GripSize), QPoint(0,0), QPoint(GripSize, 0), QPoint(GripSize, GripSize), QPoint(0, GripSize)});
 }
 
 //_____________________________________________

kdecoration/breezesizegrip.h

@@ -63,7 +63,7 @@ private:
     //* grip size
     enum {
         Offset = 0,
-        GripSize = 18,
+        GripSize = 10,
     };
 
     //* decoration