Ref T107, some minor fixes while investigating T107

src/blackgui/pluginselector.cpp

@@ -8,6 +8,7 @@
  */
 
 #include "blackgui/pluginselector.h"
+#include "blackmisc/verify.h"
 
 #include <QCheckBox>
 #include <QHBoxLayout>
@@ -36,6 +37,10 @@ namespace BlackGui
 
     void CPluginSelector::addPlugin(const QString &identifier, const QString &name, bool hasConfig, bool enabled)
     {
+        // skip if identifier is missing, which should normally not happen
+        BLACK_VERIFY_X(!identifier.isEmpty(), Q_FUNC_INFO, "Missing identifier");
+        if (identifier.isEmpty()) { return; }
+
         QWidget *pw = new QWidget;
         QHBoxLayout *layout = new QHBoxLayout;
         layout->setContentsMargins(0, 0, 0, 0);