fix: scroll to the bottom after the state update

Closes #1736

Signed-off-by: Akos Kitta <a.kitta@arduino.cc>

arduino-ide-extension/src/browser/serial/monitor/serial-monitor-send-output.tsx

@@ -65,11 +65,13 @@ export class SerialMonitorOutput extends React.Component<
           this.state.charCount
         );
         const [lines, charCount] = truncateLines(newLines, totalCharCount);
-        this.setState({
+        this.setState(
+          {
             lines,
             charCount,
-        });
-        this.scrollToBottom();
+          },
+          () => this.scrollToBottom()
+        );
       }),
       this.props.clearConsoleEvent(() =>
         this.setState({ lines: [], charCount: 0 })