Add login window, move database open from SelectFormWidget to login window.

src/SelectFormWidget.cpp

@@ -65,7 +65,7 @@ SelectFormWidget::SelectFormWidget(QWidget *parent) :
     table->verticalHeader()->setDefaultSectionSize(38);
     table->horizontalHeader()->setStretchLastSection(true);
     //dat from SQLITE
-    SQLHelper::Open();
+
     auto model = SQLHelper::getTable("Patient");
     model->select();
     model->setHeaderData(1,Qt::Horizontal,"ID");