Fix minor style issues

qt/widgets/instrumentview/src/InstrumentWidget.cpp

@@ -423,7 +423,7 @@ QString InstrumentWidget::getSaveFileName(const QString &title,
  * Update the info text displayed at the bottom of the window.
  */
 void InstrumentWidget::updateInfoText(const QString &text) {
-  if (text.length() == 0) {
+  if (text.isEmpty()) {
     setInfoText(getSurfaceInfoText());
   } else {
     setInfoText(text);

qt/widgets/instrumentview/src/InstrumentWidgetMaskTab.cpp

@@ -581,10 +581,10 @@ void InstrumentWidgetMaskTab::singlePixelPicked(size_t pickID) {
           QString("Pixel %0 picked for grouping").arg(pickID));
 
     } else if (m_tube->isChecked()) {
-      std::string message = "Parent " +
-                            componentInfo.componentID(parent)->getName() +
-                            " picked for grouping";
-      m_instrWidget->updateInfoText(QString::fromStdString(message));
+      QString message = QString("Component %0 picked for grouping")
+                            .arg(QString::fromStdString(
+                                componentInfo.componentID(parent)->getName()));
+      m_instrWidget->updateInfoText(message);
     }
   }
 }