fix(cpu): Reduce CPU usage by avatar render

Fix #4843

src/widget/maskablepixmapwidget.cpp

@@ -90,14 +90,6 @@ void MaskablePixmapWidget::setSize(QSize size)
     }
 }
 
-
-
-void MaskablePixmapWidget::paintEvent(QPaintEvent* e)
-{
-    QLabel::setPixmap(*renderTarget);
-    QLabel::paintEvent(e);
-}
-
 void MaskablePixmapWidget::mousePressEvent(QMouseEvent*)
 {
     if (clickable) {
@@ -118,4 +110,5 @@ void MaskablePixmapWidget::updatePixmap()
     painter.setCompositionMode(QPainter::CompositionMode_DestinationIn);
     painter.drawPixmap(0, 0, mask);
     painter.end();
+    QLabel::setPixmap(*renderTarget);
 }

src/widget/maskablepixmapwidget.h

@@ -38,7 +38,6 @@ signals:
     void clicked();
 
 protected:
-    void paintEvent(QPaintEvent*) final override;
     void mousePressEvent(QMouseEvent*) final override;
 
 private: