Gui: Allow expressions in the VarSet dialog (#22719)

* Gui: Allow expressions in the VarSet dialog

* Gui: Process review comments VarSet Dialog

Co-authored-by: Kacper Donat <kadet1090@gmail.com>

---------

Co-authored-by: Kacper Donat <kadet1090@gmail.com>

src/Gui/Dialogs/DlgAddPropertyVarSet.h

@@ -96,7 +96,13 @@ private:
         Abort = true
     };
 
+    enum class FieldChange : std::uint8_t {
+        Name,
+        Type
+    };
+
     int findLabelRow(const char* labelName, QFormLayout* layout);
+    void removeExistingWidget(QFormLayout* layout, int labelRow);
     void setWidgetForLabel(const char* labelName, QWidget* widget);
     void initializeGroup();
 
@@ -120,17 +126,26 @@ private:
     bool isTypeValid();
     bool areFieldsValid();
 
-    void onTextFieldChanged(const QString& text);
+    void setEditor(bool valueNeedsReset);
+    void buildForUnbound(bool valueNeedsReset);
+    void setPropertyItem(App::Property* prop);
+    void buildForBound(bool valueNeedsReset);
+    bool clearBoundProperty();
+    bool clear(FieldChange fieldChange);
+    void onNameChanged(const QString& text);
+    void onGroupFinished();
+    void onTypeChanged(const QString& text);
+
     void showStatusMessage();
 
     void removeEditor();
-    void onTypeChanged(const QString& text);
 
     void openTransaction();
     void critical(const QString& title, const QString& text);
-    bool createProperty();
+    App::Property* createProperty();
     void closeTransaction(TransactionOption option);
     void clearFields();
+    void addDocumentation();
 
 private:
     App::VarSet* varSet;