Apply index folder directory change immediatly

platesolving.cpp

@@ -198,4 +198,5 @@ void PlateSolving::settings()
 {
     PlateSolvingSettings settings(this);
     settings.exec();
+    _solver->setIndexFolder(settings.indexDirectory());
 }

platesolvingsettings.cpp

@@ -123,6 +123,11 @@ void PlateSolvingSettings::checkIndexFiles()
     checkScale(_ui->scale19, 19);
 }
 
+QString PlateSolvingSettings::indexDirectory() const
+{
+    return _ui->indexPaths->currentText();
+}
+
 void PlateSolvingSettings::progress(int percent, int files)
 {
     _ui->filesRemaining->setText(tr("%1 files").arg(files));

platesolvingsettings.h

@@ -18,6 +18,7 @@ public:
     explicit PlateSolvingSettings(QWidget *parent = nullptr);
     ~PlateSolvingSettings();
     void checkIndexFiles();
+    QString indexDirectory() const;
 protected slots:
     void progress(int percent, int files);
 private: