ChatLog: don't start the resize worker if the width doesn't change

src/chatlog/chatlog.cpp

@@ -613,10 +613,20 @@ void ChatLog::scrollContentsBy(int dx, int dy)
 }
 
 void ChatLog::resizeEvent(QResizeEvent* ev)
+{
+    bool stb = stickToBottom();
+
+    if(ev->size().width() != ev->oldSize().width())
     {
         startResizeWorker();
+        stb = false; // let the resize worker handle it
+    }
+
     QGraphicsView::resizeEvent(ev);
 
+    if(stb)
+        scrollToBottom();
+
     updateBusyNotification();
 }