Remove dependency to QWidget / QMainWindow

This not GUI library!

src/com.cpp

@@ -49,7 +49,7 @@ bool T_com::readFromSerial(QByteArray &data, uint16_t &sendLength)
 // -------------------------------------------------------------------------------------------------------------
 
 
-T_com::T_com(QWidget *parent) : QMainWindow(parent)
+T_com::T_com(QObject *parent) : QObject(parent)
 {
     // port settings come from tabCom->Sdata->serial
 

src/datIf.cpp

@@ -19,7 +19,7 @@ static uint8_t cycl_running;
 
 //static bool     datif_DCdataValid;
 
-T_datif::T_datif(QWidget *parent) : QMainWindow(parent)
+T_datif::T_datif(QObject *parent) : QObject(parent)
 {
 
     myDCIF = new T_prot();