Build system changed to Cmake, ORM changed to QxORM, Qt6 compatibility.

core/defaultformhandler.h

@@ -9,8 +9,8 @@
 class CORESHARED_EXPORT IFormHandler
 {
 public:
-    IFormHandler() {}
-    virtual ~IFormHandler() {}
+    IFormHandler() = default;
+    virtual ~IFormHandler() = default;
 
     virtual void showForm(IForm *formWidget) = 0;
 };
@@ -19,7 +19,7 @@ class CORESHARED_EXPORT DefaultFormHandler : public IFormHandler
 {
 public:
     DefaultFormHandler();
-    virtual ~DefaultFormHandler();
+    ~DefaultFormHandler() override;
 
 private:
     FormDialog *m_dialog;