correct logic for sR checkbox

GUI/View/Import/Legacy1dDialog.cpp

@@ -40,7 +40,7 @@ Legacy1dDialog::Legacy1dDialog()
 
     auto have_sR = new QCheckBox;
     gridLayout->addWidget(have_sR, 2, 0);
-    have_sR->setEnabled(Msettings.col_sR != 0);
+    have_sR->setCheckState(Msettings.col_sR == 0 ? Qt::Unchecked : Qt::Checked);
     // connect statement is below, as it needs access to other widgets
 
     gridLayout->addWidget(new QLabel("Read Q"), 0, 1);
@@ -51,29 +51,28 @@ Legacy1dDialog::Legacy1dDialog()
     gridLayout->addWidget(new QLabel("from  column"), 1, 2);
 
     auto from_sR = new QLabel("from  column"); // this one can be made invisible
-    gridLayout->addWidget(new QLabel("from  column"), 2, 2);
+    gridLayout->addWidget(from_sR, 2, 2);
 
     auto sb_Q = new QSpinBox;
     gridLayout->addWidget(sb_Q, 0, 3);
+    sb_Q->setMinimum(1);
     sb_Q->setValue(Msettings.col_Q);
     connect(sb_Q, &QSpinBox::valueChanged, [&p = Msettings](int i) { p.col_Q = i; });
 
     auto sb_R = new QSpinBox;
     gridLayout->addWidget(sb_R, 1, 3);
+    sb_R->setMinimum(1);
     sb_R->setValue(Msettings.col_R);
     connect(sb_R, &QSpinBox::valueChanged, [&p = Msettings](int i) { p.col_R = i; });
 
     auto sb_sR = new QSpinBox;
     gridLayout->addWidget(sb_sR, 2, 3);
+    sb_sR->setMinimum(1);
     sb_sR->setValue(Msettings.col_sR);
     connect(sb_sR, &QSpinBox::valueChanged, [&p = Msettings](int i) { p.col_sR = i; });
 
     connect(have_sR, &QCheckBox::stateChanged, [&p = Msettings, from_sR, sb_sR](int i) {
-        if (i) {
-            p.col_sR = p.col_R + 1;
-        } else {
-            p.col_sR = 0;
-        }
+        sb_sR->setValue(i ? p.col_R + 1 : 0);
         from_sR->setVisible(i != 0);
         sb_sR->setVisible(i != 0);
     });