feat: Add middle mouse clicked signal for GenericChatroom

src/widget/genericchatroomwidget.cpp

@@ -186,10 +186,13 @@ void GenericChatroomWidget::activate()
 
 void GenericChatroomWidget::mouseReleaseEvent(QMouseEvent* event)
 {
-    if (event->button() == Qt::LeftButton)
+    if (event->button() == Qt::LeftButton) {
         emit chatroomWidgetClicked(this);
-    else
+    } else if (event->button() == Qt::MiddleButton) {
+        emit middleMouseClicked();
+    } else {
         event->ignore();
+    }
 }
 
 void GenericChatroomWidget::enterEvent(QEvent*)

src/widget/genericchatroomwidget.h

@@ -69,11 +69,12 @@ public slots:
 signals:
     void chatroomWidgetClicked(GenericChatroomWidget* widget);
     void newWindowOpened(GenericChatroomWidget* widget);
+    void middleMouseClicked();
 
 protected:
-    virtual void mouseReleaseEvent(QMouseEvent* event) override;
-    virtual void enterEvent(QEvent* e) override;
-    virtual void leaveEvent(QEvent* e) override;
+    void mouseReleaseEvent(QMouseEvent* event) override;
+    void enterEvent(QEvent* e) override;
+    void leaveEvent(QEvent* e) override;
 
     QPoint dragStartPos;