ensure that there are no duplicate names in lists; disable cp/rm actions for empty lists

GUI/Model/Type/NamedItem.cpp

@@ -18,7 +18,8 @@
 
 namespace {
 
-QStringList splitName(const QString& s) {
+QStringList splitName(const QString& s)
+{
     QRegularExpression pattern("(.*)_(\\d+)$");
     QRegularExpressionMatch match = pattern.match(s);
     if (match.hasMatch()) {
@@ -42,19 +43,19 @@ void NamedItem::renumber(const QStringList& extant_names)
     // Determine highest number for given stem in extant_items
     int imax = 0;
     for (QString tname : extant_names) {
-	QStringList ts = ::splitName(tname);
-	if (ts.isEmpty()) {
-	    if (tname == stem)
-		imax = std::max(imax, 1);
-	} else {
-	    if (ts[0] == stem)
-		imax = std::max(imax, ts[1].toInt());
-	}
+        QStringList ts = ::splitName(tname);
+        if (ts.isEmpty()) {
+            if (tname == stem)
+                imax = std::max(imax, 1);
+        } else {
+            if (ts[0] == stem)
+                imax = std::max(imax, ts[1].toInt());
+        }
     }
 
     if (imax != 0)
-	setName(stem + "_" + QString::number(imax + 1));
+        setName(stem + "_" + QString::number(imax + 1));
 
     if (name().contains(' '))
-	setName(name().replace(' ', '_'));
+        setName(name().replace(' ', '_'));
 }