Removing initializer-list creation of QList to fix Windows build.

radixwidgets/navigationactionmanager.cc

 #include "radixwidgets/navigationactionmanager.hh"
 
 #include <QHash>
+#include <QList>
 #include <QMenu>
 
 #include "radixbug/bug.hh"
@@ -29,7 +30,9 @@ void NavigationActionManager::registerAction(NavigationItem *item, QString text,
   if (item_it == p->item_functions.end())
   {
     // create a new reference
-    p->item_functions.insert(item, {std::make_pair(text, functor)});
+    QList<std::pair<QString, std::function<void()>>> list;
+    list.append(std::make_pair(text, functor));
+    p->item_functions.insert(item, list);
   }
   else
   {