Do not set active model from model list dialog

It's confusing and non-intuitive that saving the changes made to submodels opens the last
selected one. Furthermore we have the menu entries to open submodels.

common/project.cpp

@@ -335,7 +335,6 @@ void Project::ShowModelListDialog()
 
 	mModels = NewModels;
 
-	SetActiveModel(Dialog.mActiveModel);
 	gMainWindow->UpdateTitle();
 	gMainWindow->UpdateModels();
 }

qt/lc_qmodellistdialog.cpp

@@ -44,10 +44,6 @@ void lcQModelListDialog::accept()
 		mModels.append(QPair<QString, lcModel*>(Item->text(), (lcModel*)Item->data(Qt::UserRole).value<uintptr_t>()));
 	}
 
-	mActiveModel = ui->ModelList->currentRow();
-	if (mActiveModel < 0)
-		mActiveModel = 0;
-
 	QDialog::accept();
 }
 
@@ -182,4 +178,4 @@ void lcQModelListDialog::on_ModelList_currentRowChanged(int CurrentRow)
 	Q_UNUSED(CurrentRow);
 
 	UpdateButtons();
-}
+}

qt/lc_qmodellistdialog.h

@@ -14,7 +14,6 @@ public:
 	lcQModelListDialog(QWidget* Parent, QList<QPair<QString, lcModel*>>& Models);
 	~lcQModelListDialog();
 
-	int mActiveModel;
 	QList<QPair<QString, lcModel*>>& mModels;
 
 public slots: