accept enter key along with return key when setting values

- Add space between number and unit
- Increase width of toolbar items to (hopefully) be fully visible for
  all operating systems and themes
- Adjust order of automatically created calibration measurements to
  match LibreCAL
- Disable edit triggers for calibration measurement table
- Show timestamps of calibration measurements in local time
- Allow starting calibration measurements by double clicking row

Software/PC_Application/LibreVNA-GUI/Calibration/calibration.cpp

@@ -533,8 +533,9 @@ void Calibration::edit(TraceModel *traceModel)
             ui->table->setCellWidget(i, 1, measurements[i]->createStandardWidget());
             ui->table->setCellWidget(i, 2, measurements[i]->createSettingsWidget());
             ui->table->setItem(i, 3, measurements[i]->getStatisticsItem());
-            ui->table->setItem(i, 4, new QTableWidgetItem(measurements[i]->getTimestamp().toString()));
+            ui->table->setItem(i, 4, new QTableWidgetItem(measurements[i]->getTimestamp().toLocalTime().toString()));
         }
+        ui->table->setEditTriggers(QAbstractItemView::NoEditTriggers);
         ui->table->selectRow(row);
         updateTableEditButtons();
     };
@@ -625,6 +626,11 @@ void Calibration::edit(TraceModel *traceModel)
         emit startMeasurements(m);
     });
 
+    // double clicking on a row also starts the measurement
+    connect(ui->table, &QTableWidget::doubleClicked, this, [=](){
+        emit ui->measure->clicked();
+    });
+
     connect(ui->selectMeasurement, &QPushButton::clicked, [=](){
         auto selected = ui->table->selectionModel()->selectedRows();
         if(selected.size() != 1) {
@@ -1971,12 +1977,12 @@ void Calibration::createDefaultMeasurements(Calibration::DefaultMeasurements dm)
 {
     lock_guard<recursive_mutex> guard(access);
     auto createSOL = [=](int port) {
-        auto _short = new CalibrationMeasurement::Short(this);
-        _short->setPort(port);
-        measurements.push_back(_short);
         auto open = new CalibrationMeasurement::Open(this);
         open->setPort(port);
         measurements.push_back(open);
+        auto _short = new CalibrationMeasurement::Short(this);
+        _short->setPort(port);
+        measurements.push_back(_short);
         auto load = new CalibrationMeasurement::Load(this);
         load->setPort(port);
         measurements.push_back(load);

Software/PC_Application/LibreVNA-GUI/CustomWidgets/siunitedit.cpp

@@ -59,7 +59,7 @@ bool SIUnitEdit::eventFilter(QObject *, QEvent *event)
             clearFocus();
             return true;
         }
-        if(key == Qt::Key_Return) {
+        if(key == Qt::Key_Return || key == Qt::Key_Enter) {
             // use new value without prefix
            parseNewValue(1.0);
            continueEditing();

Software/PC_Application/LibreVNA-GUI/SpectrumAnalyzer/spectrumanalyzer.cpp

@@ -112,7 +112,7 @@ SpectrumAnalyzer::SpectrumAnalyzer(AppWindow *window, QString name)
 
     auto eStart = new SIUnitEdit("Hz", " kMG", 6);
     // calculate width required with expected string length
-    auto width = QFontMetrics(eStart->font()).horizontalAdvance("3.00000GHz") + 15;
+    auto width = QFontMetrics(eStart->font()).horizontalAdvance("10.00000 MHz") + 15;
     eStart->setFixedWidth(width);
     eStart->setToolTip("Start frequency");
     connect(eStart, &SIUnitEdit::valueChanged, this, &SpectrumAnalyzer::SetStartFreq);

Software/PC_Application/LibreVNA-GUI/VNA/vna.cpp

@@ -325,7 +325,7 @@ VNA::VNA(AppWindow *window, QString name)
 
     auto eStart = new SIUnitEdit("Hz", " kMG", 6);
     // calculate width required with expected string length
-    auto width = QFontMetrics(eStart->font()).horizontalAdvance("3.00000GHz") + 15;
+    auto width = QFontMetrics(eStart->font()).horizontalAdvance("10.00000 MHz") + 15;
     eStart->setFixedWidth(width);
     eStart->setToolTip("Start frequency");
     connect(eStart, &SIUnitEdit::valueChanged, this, &VNA::SetStartFreq);

Software/PC_Application/LibreVNA-GUI/unit.cpp

@@ -68,6 +68,10 @@ QString Unit::ToString(double value, QString unit, QString prefixes, int precisi
         }
         ss << value;
         sValue.append(QString::fromStdString(ss.str()));
+        if(!unit.isEmpty() && !unit.startsWith(' ')) {
+            // add space between number and unit
+            sValue.append(' ');
+        }
         sValue.append(prefixes[prefixIndex]);
     }
     sValue.append(unit);