Port away from QList::toSet()

The QSet range constructor requires Qt 5.14.

In `DolphinView::slotHeaderContextMenuRequested()` the conversion from
QList to QSet was pointless, so we just use a QList now.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/kitemviews/kfileitemlistview.cpp b/src/kitemviews/kfileitemlistview.cpp
index 73d6c72e9..4ccda7b51 100644
--- a/src/kitemviews/kfileitemlistview.cpp
+++ b/src/kitemviews/kfileitemlistview.cpp
@@ -388,7 +388,8 @@ void KFileItemListView::applyRolesToModel()
 
     // KFileItemModel does not distinct between "visible" and "invisible" roles.
     // Add all roles that are mandatory for having a working KFileItemListView:
-    QSet<QByteArray> roles = visibleRoles().toSet();
+    const auto visibleRoles = this->visibleRoles();
+    auto roles = QSet<QByteArray>(visibleRoles.constBegin(), visibleRoles.constEnd());
     roles.insert("iconPixmap");
     roles.insert("iconName");
     roles.insert("text");