Solved large empty areas problem after changing visibiliy

When choosing the 'LC matching' topolgy after 'Multistage lambda/4'
there were large empty areas. This problem is solved by setting a size
constraint in the main layout...

I also renamed 'LC matching' as 'L-section' since I reckon that it is
more meaninful and replaced the 'Ohms' labels by the Greek letter \Omega

qucs/qucs/dialogs/matchdialog.cpp

@@ -52,6 +52,7 @@ MatchDialog::MatchDialog(QWidget *parent)
   DoubleVal = new QDoubleValidator(this);
 
   all = new QHBoxLayout(this);
+  all->setSizeConstraint(QLayout::SetFixedSize);
 
   /* The main frame was divided into two vertical layouts. The first one, on the left side, is much the
      old matching tool whereas the other layout was included specifically for microstrip synthesis.
@@ -124,8 +125,6 @@ MatchDialog::MatchDialog(QWidget *parent)
   hsubs->addWidget(ResistivityLabel, 6, 0);
   hsubs->addWidget(ResistivityEdit, 6, 1);
 
- // hsubs->insertStretch(-1, 1); // Remove spacing between layouts.
-
   QHBoxLayout *h4 = new QHBoxLayout();
   h4->setSpacing(3);
   TopoLabel = new QLabel(tr("Method"));
@@ -134,12 +133,12 @@ MatchDialog::MatchDialog(QWidget *parent)
   // Matching network topology
   TopoCombo = new QComboBox();
   TopoCombo->setFixedWidth(220);
-  TopoCombo->addItem(tr("LC matching"));
+  TopoCombo->addItem(tr("L-section"));
   TopoCombo->addItem(tr("Single stub"));
   TopoCombo->addItem(tr("Double stub"));
   QString str = tr("Multistage ") + QString(QChar(0xBB, 0x03)) + "/4";
   TopoCombo->addItem(str);
-  TopoCombo->addItem("Cascaded LC sections");
+  TopoCombo->addItem("Cascaded L-sections");
   str =  QString(QChar(0xBB, 0x03)) + "/8 +" +  QString(QChar(0xBB, 0x03)) + "/4 transformer";
   TopoCombo->addItem(str);
 
@@ -233,14 +232,14 @@ MatchDialog::MatchDialog(QWidget *parent)
   Ref1Edit = new QLineEdit("50");
   Ref1Edit->setMaximumWidth(75);
   Ref1Edit->setValidator(DoubleVal);
-  Ohm1Label = new QLabel(tr("Ohms"));
+  Ohm1Label = new QLabel(QString(QChar(0xA9, 0x03)));
   connect(Ref1Edit, SIGNAL(textChanged(const QString&)),
           SLOT(slotImpedanceChanged(const QString&)));
   Port2Label = new QLabel(tr("Port 2"));
   Ref2Edit = new QLineEdit("50");
   Ref2Edit->setMaximumWidth(75);
   Ref2Edit->setValidator(DoubleVal);
-  Ohm2Label = new QLabel(tr("Ohms"));
+  Ohm2Label = new QLabel(QString(QChar(0xA9, 0x03)));
   ImpLayout->addWidget(Port1Label);
   ImpLayout->addWidget(Ref1Edit);
   ImpLayout->addWidget(Ohm1Label);
@@ -401,7 +400,6 @@ MatchDialog::MatchDialog(QWidget *parent)
 
   slotReflexionChanged("");  // calculate impedance
   setFrequency(1e9);  // set 1GHz
-  this->adjustSize();
 }
 
 MatchDialog::~MatchDialog()
@@ -536,7 +534,6 @@ void MatchDialog::slotChangeMode_TopoCombo()
         OrderLabel->setVisible(false);
         OrderEdit->setVisible(false);
     }
-  this->adjustSize();
 }
 
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