Minor fixes of timer system

mainwindow.cpp

@@ -51,6 +51,8 @@ MainWindow::MainWindow(QWidget *parent) :
     else sendTimer.setInterval(5);
     sendTimer.start();
 
+    tempWarning.setInterval(10000);
+
     sinceLastTemp.start();
 }
 

mainwindow.h

@@ -32,6 +32,7 @@ public:
     QVector<QString> gcode;
     QTimer sendTimer;
     QTimer statusTimer;
+    QTimer tempWarning;
     QElapsedTimer sinceLastTemp;
     QSettings settings;
     QStringList recentFiles;