rm DoubleDescriptor from code

The rest of DoubleDescriptor interfaces are replaced to DoubleProperty.

DoubleDescriptor is completely removed.

Steps of Descriptor refactoring:

1. reduce usage of functional pointers set() and get() of DoubleDescriptor
2. move Descriptor functionality to Property
3. use Property instead of Descriptor
4. remove Descriptor from code
5. refactor serialization of Property
6. replace Property macro definitions like DOUBLE_PROPERTY(intensity, Intensity) by explicit member with setter and getter

This MR does (1,3,4) for DoubleDescriptor

GUI/View/Instrument/DetectorAlignmentEditor.cpp

@@ -62,10 +62,10 @@ DetectorAlignmentEditor::DetectorAlignmentEditor(QWidget* parent, RectangularDet
 }
 
 DoubleSpinBox* DetectorAlignmentEditor::createSpinBox(QFormLayout* parentFormLayout,
-                                                      const DoubleDescriptor& d)
+                                                      DoubleProperty& d)
 {
     auto* sb = GUI::Util::createDoubleSpinBoxRow(parentFormLayout, d);
-    connect(sb, &DoubleSpinBox::baseValueChanged, [=](double v) {
+    connect(sb, &DoubleSpinBox::baseValueChanged, [this, &d](double v) {
         if (d.get() != v) {
             d.set(v);
             emit dataChanged();
@@ -74,10 +74,10 @@ DoubleSpinBox* DetectorAlignmentEditor::createSpinBox(QFormLayout* parentFormLay
     return sb;
 }
 
-DoubleSpinBox* DetectorAlignmentEditor::createSpinBox(const DoubleDescriptor& d)
+DoubleSpinBox* DetectorAlignmentEditor::createSpinBox(DoubleProperty& d)
 {
     auto* sb = new DoubleSpinBox(d);
-    connect(sb, &DoubleSpinBox::baseValueChanged, [=](double v) {
+    connect(sb, &DoubleSpinBox::baseValueChanged, [this, &d](double v) {
         if (d.get() != v) {
             d.set(v);
             emit dataChanged();
@@ -86,11 +86,11 @@ DoubleSpinBox* DetectorAlignmentEditor::createSpinBox(const DoubleDescriptor& d)
     return sb;
 }
 
-void DetectorAlignmentEditor::addVector(QFormLayout* parentLayout, const VectorProperty& d)
+void DetectorAlignmentEditor::addVector(QFormLayout* parentLayout, VectorProperty& d)
 {
     auto* layout = new QHBoxLayout;
 
-    const auto add = [&](const DoubleDescriptor& d) {
+    const auto add = [&](DoubleProperty& d) {
         layout->addWidget(new QLabel(GUI::Util::labelWithUnit(d) + ":"));
         layout->addWidget(createSpinBox(d));
     };